`(2a + 3b) (a - b) = 2a^2 - 3b^2`

-3 (a + b) + 4 (2a - 3b) - (2a - b)

Incorrect: (2a+3b)(a-b)=2a^2+ab-3b^2 Correct: (2a+3b)(a-b)=2a^2+3ab-2ab-3b^2=2a^2+ab-3b^2 .

Simplify (a + b) (2a – 3b + c) – (2a – 3b) c.

factorize 2x^(2) - 5xy + 3y^(2) , and use your result to factorize 2(3a-b)^(2) - 5(3a-b)(2a-b) + 3(2a-b)^(2) . The factors are

Evaluate : ( 2a + 3b ) - ( 2a - 3b )

Verify the (a+b ) (a+b) (a +b) = a ^(3) + 3a ^(2) b + 3a^(2) b + 3a b ^(2) +b ^(3)

2a - 3b - [3a - 2b - {a - c- (a - 2b)}]

If D is the mid-point of the side B C of triangle A B C and A D is perpendicular to A C , then (a) 3b^2=a^2-c (b) 3a^2=b^2 3c^2 b^2=a^2-c^2 (d) a^2+b^2=5c^2

a^2b^3\ X\ 2a b^2 is equal to: (a) 2a^3b^4 (b) 2a^3b^5 (c) 2a b (d) a^3b^5