Question

(x-10)(x+9) using the identity x^2+(a+b)x+(a×b)

Answer 1

$\huge{Hii}$

(x - 10)(x + 9)
=> (x)^2 + {a + b}x + (a)(b)
=> x^2 + {-10 + 9}x + (-10)(9)
=> x^2 - 1x - 90

$\mathcal{\huge{Hope\: Helps}}$