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Verizon [17]
3 years ago
5

I need help how to solve it mot the answer plz and thank u

Mathematics
2 answers:
jek_recluse [69]3 years ago
4 0
The second one would be the answer. You want to plug in for this question. You can divide over the five leaving you with (x-2)^2 =25. Since you are squaring this answer, you want to get either 5 or negative five. Both -3 and 7 will do that.
Tatiana [17]3 years ago
4 0
(x-2) ^2 = 125/5,
from formula (a-b)^2= a^2 - 2ab+ b^2
the equation becomes
x^2 - 4x+4= 25
x^2-4x-21= 0
x^2 -7x+3x-21=0
x(x-7)+3(x-7)= 0
(x+3) (x-7)= 0
so either x+3=0
or x-7=0
x can have values x= -3, 7
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