Помогите номера 91,92!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Question

Помогите номера 91,92!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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Answer 1

91
√(x²-4x+4)+√(x²-8x+16)=√(x-2)²+√(x-4)²=|x-2|+|x-4|=
=|√7-2|+|√7-4|=√7-2+4-√7=2
92
√(x²-14x+49_+√(x²-22x+121)=√(x-7)²+√(x-11)²=|x-7|+|x-11|=
=|√117-7|+|√117-11|=√117-7+11-√117=4