Question

if a=3
b=-4
find 2a^2-ab-3b^2+9​

Answer 1

Answer:

2 × 3 ² +12 +48 +9

2× 9 + 69

18 + 69

87 ...

Answer 2

Putting values of a and b,we get

=>2(3)^2-3×-4-3(-4)^2+9

=>2×9-3×-4-3×16+9

=>-9

-9 is the answer

Hope it helps you