Advertisements
Advertisements
Question
If x = 2 and y = − 4, evaluate:
(5y)2
Sum
Advertisements
Solution
(5y)2
= 5 × y × 5 × y
= 5 × (− 4) × 5 × (− 4)
= (− 20) × (− 20)
= 400
shaalaa.com
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
When a = 0, b = −1, find the value of the given expression:
a2 + ab + 2
Simplify the expression and find the value if x is equal to 2:
4 (2x - 1) + 3x + 11
If a = – 10, evaluate:
a2
If m = – 7, evaluate:
2m2
If x = 5 and y = 4, evaluate:
8xy
If x = 2 and y = 10, evaluate:
30xy
If x = 2 and y = 10, evaluate:
5y2
If m = 3 and n = 7, evaluate:
(10m)2
If p = − 10, evaluate:
6p + 50
If x = − 5 and y = − 8, evaluate:
4xy
