Question

si (ax+b)²= 16x²+cx+49

Answer 1

$(ax + b) {}^{2} = 16 {x}^{2} + cx + 49 \\ (4x + 7) {}^{2} = 16 {x}^{2} +56x + 49$

$a = 4 \\ b = 7 \\ c = 56$