Question

Find the value of m so that the quadratic equation mx (x – 7) + 49 = 0 has two equal roots. The value of m is……….. *
m=4
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Answer 1

Answer:

sry i dont known the answer

Answer 2

Quadratic Equation is mx(x-7)+49=0

$m {x}^{2} - 7mx + 49 = 0$

You have given the answer m=4

$4 {x}^{2} - 7 \times 4 \times x + 49 = 0 \\ 4 {x}^{2} - 28x + 49 = 0 \\ 4 {x}^{2} - 14x - 14x + 49 = 0 \\ 2x(2x - 7) - 7(2x - 7) = 0 \\ (2x - 7)(2x - 7) = 0 \\ x = \frac{7}{2} = 3.5$