Question

Раскройте скобки и упростите полученое выражения: а)-5×(х-0, 4)+8×(х-0, 5) б) х ×(1-2у)+у×(2х+3) в)-8×(0, 5-а)+4×(а+0, 5) г)m-(3n+6)-n×(3m-5)Помогите пожалуйста!

Answer 1

A)
-5*(x-0,4)+8*(x-5)=-5x+2+8x-40=3x-38
б)
x*(1-2y)+y*(2x+3)=x-2xy+2xy+3y=x+3y
в)
-8*(0,5-a)+4*(a+0,5)=-4+8a+4a+2=12a-2
г)
m-(3n+6)-n*(3m-5)=3nm+6m-3mn+5n=11n

Answer 2

Simplifying the Given Expressions

a) -5×(х-0,4) + 8×(х-0,5)

To simplify the given expression, we can use the distributive property to expand and then combine like terms:

-5×(х-0,4) + 8×(х-0,5) = -5x + 2 + 8x - 40 = 3x - 38

Therefore, the simplified expression is 3x - 38.

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б) х × (1-2у) + у × (2х+3)

To simplify the given expression, we can use the distributive property to expand and then combine like terms:

х × (1-2у) + у × (2х+3) = x - 2xy + 2xy + 3y = x + 3y

Therefore, the simplified expression is x + 3y.

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в) -8×(0,5-а) + 4×(а+0,5)

To simplify the given expression, we can use the distributive property to expand and then combine like terms:

-8×(0,5-а) + 4×(а+0,5) = -4 + 8a + 4a + 2 = 12a - 2

Therefore, the simplified expression is 12a - 2.

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г) m-(3n+6)-n×(3m-5)

To simplify the given expression, we can use the distributive property to expand and then combine like terms:

m - (3n + 6) - n × (3m - 5) = m - 3n - 6 - 3mn + 5n = m - 3mn - 3n + 5n - 6 = m - 3mn + 2n - 6

Therefore, the simplified expression is m - 3mn + 2n - 6.

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