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b)x²-25=0 --> x²=25 --> x=5
c) x²-81=0 --> x²=81 --> x=9
d) x²-64=0 --> x²=64 --> x=8
e) x²-100=0 --> x²=100 --> x=10
f) x²-49=0 --> x²=49 --> x=7
g) x³=512 --> x=8
h) x³=729 --> x=9
i)x²-6x=16 -->
j)x²+3x=10 --> (2)²+3(2)=10
k) x+(x+1)=72 --> (8)+(8+1)=72
l)
m)
n)x²=5x --> (5)²=5(5)-->25=25
ñ) x²=4x --> (4)²=4(4) --> 16=16
o) x²=2x --> (2)²= 2(2) --> 4=4