If x =2/3+root 7 find value of (x - 3)square
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Answer: (112 - 42√7) / 9
Step-by-step explanation:
x = 2/3 + √7
=> (x - 3)^2 = (2/3 + √7 - 3)^2 = (2/3 + 3√7/3 - 9/3)^2
=> (x - 3)^2 = [(3√7 -7)/3]^2 = (63 +49 - 42√7)/9
=> (x - 3)^2 = (112 - 42√7) / 9
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