Solve the quadratic equation 2xsquare + ax - asquare = 0 for x using quadratic formula
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compare the QE with ax^2 + bx+ c=0
a=2,b=a c=a^2
b^2-4ac
a^2- 4×2×a
a^2-8a=0
a-8=0
a=8
a=2,b=a c=a^2
b^2-4ac
a^2- 4×2×a
a^2-8a=0
a-8=0
a=8
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