Question

simplify (2a+3b)(2a-3b)
$find the supplement of (180 - b) {}^{.}$
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Answer 1

1) (2a + 3b)(2a - 3b)

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

= 4a^2 - 9b^2

2) Supplement of 180 - b is “b”.

Answer 2

Answer:

4a²-9b²

Step-by-step explanation:

(a+b)(a-b)

It is a algebraic identity

So when we open these brackets, we will get

a²+ab-ab-b²

So same is the case with this problem

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

(2a)²- (3b)²

So ur answer is 4a²- 9b²