Question

se (ax+b)(10x-b)=20x²+156x-169,entao a-b e igual a

Answer 1

ax . 10x = 20x²
a = 20x²/10x²
a = 2

b . (-b) = - 169
-b² = -169 (-1)
b² = 169
b = √169
b = 13

a - b = 2 - 13 = -11