Question

Evaluate the following
(i) 12√18 + √32​

Answer 1

$2 \sqrt{18} + \sqrt{32}$

=

$2 \sqrt{2 \times 3 \times 3} + \sqrt{2 \times 2 \times 2 \times 2 \times 2}$

=

$2 \times 3 \sqrt{2} + 2 \times 2 \sqrt{2}$

=

$6 \sqrt{2} + 4 \sqrt{2}$

=

$10 \sqrt{2}$