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Using the general complete the square formula, where x^{2}+bx+c=0 becomes (a+b/2)^{2}+b^{2}+c=0, we get (x+7)^{2}-7^{2}-1=0 This can be rearranged to show that (x+7)^{2}=50 by taking the square root of both sides we find that x+7=+ or - √50 Hence the final solutions are x=-7 +√50 and x=-7-√50

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Have a Free Meeting with one of our hand picked tutors from the UK’s top universities

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