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natita [175]
3 years ago
5

Use substitution to write an equivalent quadratic equation. (3x + 2)2 + 7(3x + 2) – 8 = 0

Mathematics
2 answers:
Brut [27]3 years ago
8 0
<span>the answer is the second choice. u^2+7u-8=0 where u=3x=2</span>
Sergeu [11.5K]3 years ago
3 0

we have

(3x+2)^{2}+7(3x+2)-8=0 --------> equation 1

let's change of variable

u=(3x+2) --------> equation 2

substitute in the equation 2 in equation 1

(u)^{2}+7(u)-8=0

therefore

<u>the answer is</u>

(u)^{2}+7(u)-8=0

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8 0
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