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Use the technique of completing the square to transform the quadratic equation into the form (x + c)2 = a. 2x2 – 28x + 84 = 0
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2x2 – 28x + 84 = 0 x2 - 14x +42 =0 x2 -14x + 49 - 49 = -42 (x-7)^2 = 7
thank you for the help
\[ 2x^2 – 28x + 84 = 0 \implies x^2-14x+42 = 0 \implies (x-7)^2=7\]
thank you to
yw
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