Question

Simplify the following: a(a + 7) – 2a(a – 4)​

Answer 1

ANSWER

7+2(a+1)−3a=5a

⇒  7+2a+2−3a=5a

⇒  9−a−5a=0

⇒  9−6a=0

⇒  6a=9

⇒  a=69

∴  a=23