The trinomial 6x 2 + 7x - 20 may be factored using substitution. The first term in

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The trinomial 6x2 + 7x - 20 may be factored using substitution.

The first term in the numerator of the answer from Exercise 77 is now a perfect square. Let t = 6x (the square root of 36x2), and rewrite the expression.


Data from in Exercise 77

Multiply each term of 6x2 + 7x - 20 by 6 (the leading coefficient). Then compensate by dividing the result by 6 (that is, write it as a fraction with denominator 6). 

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Intermediate Algebra

ISBN: 9780134895987

13th Edition

Authors: Margaret Lial, John Hornsby, Terry McGinnis

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