Автор - hairulinaaraya

(3-√2)*(5+√8)=
(2+√15)*(√5-√3)
(4√t-5√s)^2
(x+√y)*(3x-4√y)
(2√a+√b)*(√a-5√b)

Ответ

Автор - m11m
1) (3-√2)(5+√8)=15-5√2+3√8-√16 =15 -5√2+6√2-4=11+√2
2) (2+√15)(√5-√3)=2√5+√75-2√3-√45=2√5+5√3-2√3-3√5=3√3 -√5
3) (4√t -5√s)² =(4√t)² - 2*4√t*5√s+(5√s)² = 16t-40√(ts)+25s
4) (x+√y)(3x-4√y)=3x²+3x√y-4x√y-4y=3x²-x√y-4y
5) (2√a+√b)(√a-5√b)=2a+√(ab)-10√(ab)-5b=2a-9√(ab)-5b

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