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olga2289 [7]
2 years ago
7

Solve the quadratic equation below x2-64=0

Mathematics
2 answers:
erica [24]2 years ago
7 0

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

Montano1993 [528]2 years ago
4 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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