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Question

Expand the following:

(iv) (3x+4)(2x 1)

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Solution

Given: Expression is (3x+4)(2x 1).
Now, expand the given binomials by multiplying (2x 1) with each term of (3x+4).
(3x+4)(2x 1)=3x×(2x 1)+4×(2x 1)
=6x23x+8x4
=6x2+5x4
Hence, (3x+4)(2x 1)=6x2+5x4.

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