Question

USE THE IDENTITY AND EVALUATE (X+3)(X+7)

Answer 1

Answer:

$(x+3)(x+7) = x^2 + 10x + 21$

Step-by-step explanation:

Identity $(x + a) (x+ b) = x^2 + (a+b)x + ab$

$(x+3)(x+7) = x^2 + (3 +7)x + 3 (7)\\= x^2 + 10x + 21$