Question

What should be the value of b if the value of 5x-2x square by 2 +b is-3 whenx=-1?

Answer 1

Answer:

$\frac{5x - 2x {}^{2} }{2 + b} \: \: \\ now \: \\ \frac{5( - 1) - 2( - 1) {}^{2} }{2 + b} = - 3 \\ \frac{ - 7}{2 + b} = - 3 \\ - 7 = - 6 - 3b \\ b = \frac{1}{3}$