Home
Class 10
MATHS
If x=1(1)/(2) is a solution of the equat...

If `x=1(1)/(2)` is a solution of the equation `2x^(2)+px-6=0`, find the value of 'p'.

Text Solution

AI Generated Solution

The correct Answer is:
To find the value of \( p \) in the quadratic equation \( 2x^2 + px - 6 = 0 \) given that \( x = 1 \frac{1}{2} \) (which is equivalent to \( \frac{3}{2} \)) is a solution, we can follow these steps: ### Step 1: Substitute the value of \( x \) Since \( x = \frac{3}{2} \) is a solution of the equation, we can substitute \( x \) into the equation: \[ 2\left(\frac{3}{2}\right)^2 + p\left(\frac{3}{2}\right) - 6 = 0 \] ### Step 2: Calculate \( \left(\frac{3}{2}\right)^2 \) Calculating \( \left(\frac{3}{2}\right)^2 \): \[ \left(\frac{3}{2}\right)^2 = \frac{9}{4} \] ### Step 3: Substitute back into the equation Now substituting this back into the equation gives: \[ 2 \cdot \frac{9}{4} + p \cdot \frac{3}{2} - 6 = 0 \] ### Step 4: Simplify \( 2 \cdot \frac{9}{4} \) Calculating \( 2 \cdot \frac{9}{4} \): \[ 2 \cdot \frac{9}{4} = \frac{18}{4} = \frac{9}{2} \] ### Step 5: Rewrite the equation Now our equation looks like: \[ \frac{9}{2} + \frac{3p}{2} - 6 = 0 \] ### Step 6: Eliminate the fraction by multiplying through by 2 To eliminate the fractions, we multiply the entire equation by 2: \[ 9 + 3p - 12 = 0 \] ### Step 7: Simplify the equation Now simplify the equation: \[ 3p - 3 = 0 \] ### Step 8: Solve for \( p \) Adding 3 to both sides gives: \[ 3p = 3 \] Dividing by 3: \[ p = 1 \] ### Final Answer Thus, the value of \( p \) is: \[ \boxed{1} \]
Promotional Banner

Topper's Solved these Questions

  • QUADRATIC EQUATIONS

    ICSE|Exercise Exercise 5(A)|5 Videos
  • QUADRATIC EQUATIONS

    ICSE|Exercise Exercise 5(B)|5 Videos
  • PROBABILITY

    ICSE|Exercise EXERCISE 25(C)|106 Videos
  • QUESTION PAPER 2019

    ICSE|Exercise SECTION B |20 Videos

Similar Questions

Explore conceptually related problems

If x=-(1)/(2) is a solution of the quadratic equation 3x^(2)+2kx-3=0 , find the velue of k.

If x=(-1)/2 , is a solution of the quadratic equation 3x^2+2k x-3=0 , find the value of k .

If x=1 , y=2 is a solution of the equation a^2x+a y=3, then find the values of a

If x=1\ a n d\ y=6 is a solution of the equation 8x-a y+a^2=0 , find the value of a

If x=k^2 and y=k is a solution of the equation x-5y+6=0 then find the values of k

If (2)/(3) and -(1)/(2) are solution of quadratic equation 6x^(2)+ax-b=0 , find the values of a and b.

If x=2alpha+1\ a n d\ y=alpha-1 is a solution of the equation 2x-3y+5=0 , find the value of alpha

If p-15=0 and 2x^(2)+px+25=0 , find the values of x.

The solution set of the equation |2x+3| -|x-1|=6 is :

If x=1 and x=2 are solutions of equations x^3+a x^2+b x+c=0 and a+b=1, then find the value of bdot