Question

. If g = -4 and h = -5 find the value of
a) 4gh
b) g²h
c) 5h - g²

Answer 1

a) 80

b) -80

c) -41

Explanation:

For g = -4 and h = -5, you want the values of ...

• 4gh
• g²h
• 5h -g²

To evaluate these expressions, put the value of the variable where the variable is, and do the arithmetic. A calculator can help.

a) 4gh

= 4(-4)(-5) = 80

b) g²h

= (-4)²(-5) = -80

c) 5h -g²

= 5(-5) -(-4)² = -25 -16 = -41