domer30 domer30

27-06-2017
Mathematics

contestada

square root of X+15 plus square root of X = 15. By observation, X=49 but when I square terms to remove radicals I don't get the desired result???

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jorel1380 jorel1380

28-06-2017

√x+15 + √x=15
√(x+15)=15-√x
x+15=225-30√x +x
30√x=210
√x=7
x=49
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