Question

The zeroes of 7_12x_4X square are
​

Answer 1

Answer:

$x = 1 \: \: \: \: \: or \: \: \: \: \: \: x = - \frac{7}{2}$

Step-by-step explanation:

$7 - 12x - 4x {}^{2} = 0 \\ - 4x {}^{2} - 12x + 7 = 0 \\ 4x {}^{2} + 12x - 7 = 0 \\ 4x {}^{2} - 2x + 14x - 7 = 0 \\ 2x(x - 1) + 7(x - 1) = 0 \\ (x - 1)(2x + 7) = 0 \\ x - 1 = 0 \: \: \: \: or \: \: \: \: 2x + 7 = 0 \\ x = 1 \: \: \: \: \: or \: \: \: \: \: \: x = - \frac{7}{2}$

ميمون ماهين