Solve the quadratic equation below
x2-64=0
2 answers:
x2-64=64
factorise with difference of two squares
(x-8)(X+8)=0
if you open the bracket you will have
X2+8x-8x-64=0
8x-8x is 0
X2+0-64
x2-64=0
Answer:
x=32
Step-by-step explanation:
first, you add 64 to both sides and you have: x2=64
second, you divide 2 on both sides to get x by itself, so 64 divided by 2 is 32
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