Question

Find the value of the expression 7a−3b+2ab when a=−4 and b=−5.

Answer 1

Answer:

7a-3b +2ab

putting values in the expression

(7×-4) -(3×-5) +(2×-4×-5)

-28 -(-15) + 40

-28+15+40

-28+55

27

your answer is 27

Answer 2

$\Large \boxed{\sf \: \large\bf\red{7a \: - \: 3b \: + \: 2ab} \rm \:}$

• Value of a is -4
• Value of b is -5

Substuting the values

⇢ 7a - 3b + 2ab

⇢ 7(-4) - 3(-5) + 2(-4)(-5)

⇢ -28 +15 + 40

⇢ -28 + 55

⇢ 27