Advertisements
Advertisements
Question
If a = − 10, evaluate:
a2 + 8a
Sum
Advertisements
Solution
a2 + 8a
= (a × a) + (8 × a)
= (− 10 × (− 10)) + (8 × (− 10))
= 100 + (− 80)
= 100 − 80
= 20
shaalaa.com
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
If m = 2, find the value of 3m − 5.
When a = 0, b = −1, find the value of the given expression:
a2 + ab + 2
If x = 4, evaluate:
3x + 8
If x = 4, evaluate:
x2 – 2x
If x = 4, evaluate:
12x + 7
If a = 5 and b = 6, evaluate:
3ab
If x = 5 and y = 4, evaluate:
8xy
If x = 2 and y = 10, evaluate:
(10x)2
If x = − 5 and y = − 8, evaluate:
3y2
Which expression has a value of 18 when x = 3?
