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Find 'a' so that the sum of the roots of...

Find 'a' so that the sum of the roots of the equation `ax^(2)+2x-3a=0` may be equal to their product.

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To find the value of 'a' such that the sum of the roots of the equation \( ax^2 + 2x - 3a = 0 \) is equal to their product, we will follow these steps: ### Step 1: Identify the coefficients The given quadratic equation is in the form \( ax^2 + bx + c = 0 \), where: - \( a = a \) - \( b = 2 \) - \( c = -3a \) ### Step 2: Write the formulas for the sum and product of the roots For a quadratic equation \( ax^2 + bx + c = 0 \): - The sum of the roots \( S \) is given by \( S = -\frac{b}{a} \) - The product of the roots \( P \) is given by \( P = \frac{c}{a} \) ### Step 3: Calculate the sum of the roots Using the formula for the sum of the roots: \[ S = -\frac{b}{a} = -\frac{2}{a} \] ### Step 4: Calculate the product of the roots Using the formula for the product of the roots: \[ P = \frac{c}{a} = \frac{-3a}{a} = -3 \] ### Step 5: Set the sum equal to the product According to the problem, we need to set the sum equal to the product: \[ -\frac{2}{a} = -3 \] ### Step 6: Solve for 'a' To solve for 'a', we can eliminate the negative signs: \[ \frac{2}{a} = 3 \] Now, cross-multiply: \[ 2 = 3a \] Dividing both sides by 3 gives: \[ a = \frac{2}{3} \] ### Conclusion Thus, the value of \( a \) that satisfies the condition is: \[ \boxed{\frac{2}{3}} \]
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ICSE-QUADRATIC EQUATIONS-EXERCISE 10 (c)
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  3. Find 'a' so that the sum of the roots of the equation ax^(2)+2x-3a=0 m...

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  4. If alpha,beta are the roots of the equation x^(2)+x+1=0, find the valu...

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  6. If the roots of the equation x^(2)+px+7=0 are denoted by alpha and bet...

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  7. If alpha,beta are the roots of the equation 3x^(2)-6x+4=0, find the va...

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  8. If alpha,beta are the roots of ax^(2)+bx+c=0, find the value of (i) ...

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  9. If the sum of the roots of the equation x^(2)-px+q=0 be m times their ...

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  10. If one root of the equation x^(2)+ax+8=0 is 4 while the equation x^(2)...

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  11. Find the value of a for which one root of the quadratic equation (a^(2...

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  12. If alpha,beta are the roots of the equation ax^(2)-bx+b=0, prove that ...

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  13. If alpha and beta are the roots of the equation x^(2)+x-7=0, form the ...

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  14. If alpha and beta are the roots of the equation 2x^(2)+3x+2=0, find th...

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  15. Find the equation whose roots are (alpha)/(beta) and (beta)/(alpha), w...

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  16. If alpha and beta are the roots of the equation 2x^(2)-3x+1=0, form th...

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  17. If a ne b and a^(2)=5a-3,b^(2)=5b-3, then form that equation whose roo...

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  18. Given that alpha and beta are the roots of the equation x^(2)=x+7. (...

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  19. Given that alpha and beta are the roots of the equation x^(2)-x+7=0, f...

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  20. Given that alpha and beta are the roots of the equation 2x^(2)-3x+4=0,...

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