Question

(3x+4) (3x-5)

using identity
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Answer 1

Step-by-step explanation:

Given we have to use identity which is (x+a) (x+b)=x^2+bx+ax+ab

hence,

(3x+4) (3x-5)=(3x)^2+(-5×3x)+(4×3x)+(-5×4)

=9x^2-15x+12x-20

=9x^2-3x-20

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Answer 2

Step-by-step explanation:

(3x+4)(3x-5)

9x²-15x+12x-20

9x-3x-20

(3x-5) (3x+4)