Question

Given that a=5, b=-2 and c=-2
work out 2b-3ac

Answer 1

so let's keep the no in places

$2 \times - 2 - 3 \times 5 \times - 2$

$= - 4 - ( - 30)$

if minus and minus multiply it becomes plus so:-

$- 4(30)$

$so \: the \: answer \: is \: 30 \times - 4 \: that \: i \:s \: - 120$

I hope it helps