Question

Evaluate \[a^2+2ab+b^2\] when a = 3 and b = 2.

Options

• 25

• 36

• 16

• 49

Answer 1

25

Explanation:

\[2a^2-b^2=(2\times a\times a)-(b\times b)\]

= (2 × 3 × 3) − (−4 × −4)

= 18 − (16)

= 18 − 16 

= 2