I want solution because I cannot anderstand
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(2a+3b)(2a-b)
=2a(2a-b)+3b(2a-b)
=4a^2-2ab+6ab-3b^2
Answered by
1
xii) (6x-7) (6x+7)
(a+b) (a-b)=(a-b)^
(6x-7)^=36^-49
(a+b) (a-b)=(a-b)^
(6x-7)^=36^-49
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