Question

Expand (x + 7) (x – 3)​

Answer 1

$(x + 7)(x - 3)$

$= x(x - 3) + 7(x - 3)$

$= {x}^{2} - 3x + 7x - 21$

$= {x}^{2} + 4x - 21$

Answer 2

Answer:

(x+7)(x-3)

using property (x+a)(x+b)=x²+(a+b)x+ab

x²+(7-3)x+7×-3

x²+4x-21