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In questions two equations numbered I an...

In questions two equations numbered I and II are given you have to solve both equations and give answer
`I. 3x^2-22x+40=0 II. 5y^2-21y+16=0`

A

if `xgty`

B

if`xgey`

C

if`xlty`

D

if`xley`

Text Solution

AI Generated Solution

The correct Answer is:
To solve the given equations, we will follow these steps: ### Step 1: Solve Equation I The first equation is: \[ 3x^2 - 22x + 40 = 0 \] To solve this quadratic equation, we will factor it. We need to find two numbers that multiply to \(3 \times 40 = 120\) and add up to \(-22\). **Finding the factors:** The factors of \(120\) that add up to \(-22\) are \(-12\) and \(-10\). Now we can rewrite the equation: \[ 3x^2 - 12x - 10x + 40 = 0 \] **Grouping terms:** Group the terms: \[ (3x^2 - 12x) + (-10x + 40) = 0 \] Factor out common terms: \[ 3x(x - 4) - 10(x - 4) = 0 \] Now we can factor by grouping: \[ (3x - 10)(x - 4) = 0 \] **Finding the values of x:** Setting each factor to zero gives us: 1. \(3x - 10 = 0 \Rightarrow x = \frac{10}{3} \approx 3.33\) 2. \(x - 4 = 0 \Rightarrow x = 4\) ### Step 2: Solve Equation II The second equation is: \[ 5y^2 - 21y + 16 = 0 \] Again, we will factor this quadratic equation. We need to find two numbers that multiply to \(5 \times 16 = 80\) and add up to \(-21\). **Finding the factors:** The factors of \(80\) that add up to \(-21\) are \(-16\) and \(-5\). Now we can rewrite the equation: \[ 5y^2 - 16y - 5y + 16 = 0 \] **Grouping terms:** Group the terms: \[ (5y^2 - 16y) + (-5y + 16) = 0 \] Factor out common terms: \[ y(5y - 16) - 1(5y - 16) = 0 \] Now we can factor by grouping: \[ (5y - 16)(y - 1) = 0 \] **Finding the values of y:** Setting each factor to zero gives us: 1. \(5y - 16 = 0 \Rightarrow y = \frac{16}{5} = 3.2\) 2. \(y - 1 = 0 \Rightarrow y = 1\) ### Step 3: Compare Values of x and y We have the following values: - For \(x\): \(\frac{10}{3} \approx 3.33\) and \(4\) - For \(y\): \(\frac{16}{5} = 3.2\) and \(1\) Now, we will compare \(x\) and \(y\): 1. \(3.33\) vs \(1\): \(3.33 > 1\) 2. \(3.33\) vs \(3.2\): \(3.33 > 3.2\) 3. \(4\) vs \(1\): \(4 > 1\) 4. \(4\) vs \(3.2\): \(4 > 3.2\) In all cases, \(x\) is greater than \(y\). ### Final Answer Thus, the relation between \(x\) and \(y\) is: \[ x > y \]
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