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kari74 [83]
3 years ago
11

(2x+4)^2 - (x-5)^2 = 26x Please solve (explained)

Mathematics
1 answer:
Zina [86]3 years ago
5 0

Expand the squared binomials:

(2x+4)^2=4x^2+16x+16

(x-5)^2=x^2-10x+25

Then

(4x^2+16x+16)-(x^2-10x+25)=3x^2+26x-9=26x

\implies3x^2-9=0

\implies3x^2=9

\implies x^2=3

\implies x=\pm\sqrt3

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