Question 196189
(2x +5)^2 = 49
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square  root  of  both  sides
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(2x+5) = +/- 7
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(1)  2x+5  =  +7
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2x = 2
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x=1
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(2)  2x +5 = -7
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2x = -12
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x=-6
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checking
x=1,,, (2(1) +5)^2 = 7^2 =49,,,,ok
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x=  -6,,,(2(-6) +5)^2 = (-12 +5)^2 = (-7)^2 = 49,,,,ok
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Remember  problems  to  2nd  power have  2  answers