Question

1) 7x(x + 3) is a completely
factoris form of 7x2 + 21x.
True
ОО
False​

Answer 1

Given:

• 7x (x + 3)

Proof:

• True or False

Solution:

➳ 7x (x + 3) = 7x² + 21x

➳ 7x² + 21x = 7x² + 21x

• Hence, it is True.

Answer 2

True

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