Advertisements
Advertisements
Question
From the formula B = 2a2 – b2, calculate the value of B when a = 3 and b = − 1.
Sum
Advertisements
Solution
B = 2a2 – b2
Put the values of a = 3 and b = − 1 in above equation
B = 2 × (3)2 – (− 1)2
B = 18 – 1
B = 17
Value of B is = 17
shaalaa.com
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
Find the value of the following expression, when x = −1:
2x2 − x − 2
Simplify the expression and find the value if x is equal to 2.
6x + 5 (x − 2)
Simplify this expression and find its value if x = 3, a = −1, b = −2.
3x - 5 - x + 9
Simplify this expression and find its value if x = 3, a = −1, b = −2.
10 - 3b - 4 - 5b
If m = 2, evaluate:
15m2 – 10m
If x = 5 and y = 4, evaluate:
8xy
If y = 5 and z = 2, evaluate:
9y2z
If x = − 6, evaluate:
3x2 + 8x
If x = 2 and y = − 4, evaluate:
5x2y
If x = − 5 and y = − 8, evaluate:
4x2
