Question

Oblicz
a) (√3+2√2)(4√3-8√2)
b)(2√5-4√2)(2√2+√5)
c) (2√3-3√2(√2+√3)-( 4-√6)
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Answer 1

a)(3+2√2)(4√3-8√2)= (√3+2√2)*4( 3-2√2)=4(3-8)=-20

b)(2√5-4√2)(2√2+√5)=-2(2√2-√5)(2√2+√5)=-2(8-5)=-6

 c) (2√3-3√2)(√2+√3)-( 4-√6)=2√6 + 3-6- 3√6 -6+√6 =-9