Question

If a=2,b=-1 the value of 4a2+5ab-3b2is

Answer 1

Answer:

12

Step-by-step explanation:

a = 2

b = -1

∴ 4a2 + 5ab + ( -3)b2

= 4 × 2 ×2 + 5 × 2 × (-1) + (-3) × (-1) × 2

= 16 - 10 +6

= 12

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Answer 2

Answer:

Step-by-step explanation:

4(2)²+5{2(-1)]-3(-1)²

=4(4)+5(-2)-3(1)

=16-10-3

=3

Ans. = 3