plzz guy's solve it quickly
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Answered by
1
Answer:
11.53
Step-by-step explanation:
=> 217 - x^2 = x^2 - 49
=> 2x^2 = 266
=> x^2 = 266/2
=> x^2 = 133
=> x= 11.53
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Answered by
1
X=21 and -8
Step-by-step explanation:
√(217-x)= x -7
by squaring both sides
217-x=(x-7)^2
217 - x = x² - 14x + 49
=> x² - 13x - 168 = 0
splitting the middle term we get,
=> x² +8x - 21x -168 = 0
=> x(x+8) - 21(x+8) = 0
=> (x-21)(x+8) = 0
=> (x-21) = 0 or (x+8) = 0
=> x = 21 or x = -8
Hence the solution to the given equation is x = 21 or x = -8
I hope it helps.
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