Question

Раскройте скобки: а) 9*(5x+2) б) 7*(9x-11) в) 5*(7c+3) г) (10+7x)*6 д) (3y-5)*3 е) (9-5y)*8

Answer 1

А).45х+18
б)63х-77
в)35с+15
г)60+42х
д)9у-15
е)72-40у

Answer 2

а) 9*(5x+2)

To expand the expression 9*(5x+2), we can distribute the 9 to both terms inside the parentheses:

9 * 5x + 9 * 2

This simplifies to:

45x + 18

б) 7*(9x-11)

To expand the expression 7*(9x-11), we can distribute the 7 to both terms inside the parentheses:

7 * 9x - 7 * 11

This simplifies to:

63x - 77

в) 5*(7c+3)

To expand the expression 5*(7c+3), we can distribute the 5 to both terms inside the parentheses:

5 * 7c + 5 * 3

This simplifies to:

35c + 15

г) (10+7x)*6

To expand the expression (10+7x)*6, we can distribute the 6 to both terms inside the parentheses:

6 * 10 + 6 * 7x

This simplifies to:

60 + 42x

д) (3y-5)*3

To expand the expression (3y-5)*3, we can distribute the 3 to both terms inside the parentheses:

3 * 3y - 3 * 5

This simplifies to:

9y - 15

е) (9-5y)*8

To expand the expression (9-5y)*8, we can distribute the 8 to both terms inside the parentheses:

8 * 9 - 8 * 5y

This simplifies to:

72 - 40y

So, after expanding the expressions, we have: а) 9*(5x+2) = 45x + 18 б) 7*(9x-11) = 63x - 77 в) 5*(7c+3) = 35c + 15 г) (10+7x)*6 = 60 + 42x д) (3y-5)*3 = 9y - 15 е) (9-5y)*8 = 72 - 40y