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Advocard [28]
3 years ago
13

Solve the equation. 8x2 – 4 = 28

Mathematics
2 answers:
Arte-miy333 [17]3 years ago
5 0
Its 2,-2............
Flura [38]3 years ago
4 0
Hello,

Your answer would be 2, -2.

8x^2 - 4 = 28

8x^2-4+4=28+4

8x^2 = 32

\frac{8x^2}{8}=  \frac{32}{8}  


x^2 = 4

x = +/4 

x = 2 or x = -2

2 , -2 would be the answer! :)


Mark Brainliest if this helped you :)
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Step by step solution :

Step  1  :

Trying to factor as a Difference of Squares :

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Proof :  (A+B) • (A-B) =

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Note :  AB = BA is the commutative property of multiplication.

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Check : 2 is not a square !!

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