Question

cele 3.....plssssssssss

Answer 1

Răspuns

Explicație pas cu pas:

1)    8 x + 3 y - 4 x - 2 y  - 4= 4 x + y - 4

= ( 8 x - 4 x) + ( 3 y - 2 y ) - 4 =

= 4 x + y - 4

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2)  x√3 - y√8 + x√27 + 2 y√32 = 4 x√3 + 6 y√2

= ( x√3 + x√27 ) + ( - y√8 + 2 y√32) =

= ( x√3 + 3 x√3 ) + ( - 2 y√2 + 2 × 4 y√2 ) =

= 4 x √3 + ( 8 y√2 - 2 y√2 ) =

= 4 x√3 + 6 y√2 =

= 2 × ( 2 x√3 + 3 y√2 )

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√8 =√2³ = 2√2

√27 = √9 × √3 = 3√3

√32 = √(16×2) = 4√2

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3) x³√2 × ( - x y √3 ) = - x⁴ y √6