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What are the possible values for x in the equation 4x²=64

1) x=0
2) x=4
3) x=4,-4
4) x=0,4,-4

Sagot :

Lilith
[tex]4x^2=64\\ \\4x^2-64 =0 \ \ /:4 \\ \\ x^2-16 =0 \\ \\x^2-4^2=0 \\ \\ (x-4)(x+4)=0 \\ \\ x-4=0 \ \ or \ \ x+4 =0 \\ \\ x=4 \ \ or \ \ x= -4 \\ \\Answer : \ 3) \ \ x=4,-4[/tex]
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