116 Expand and simplify 1 6ab05ac 3 2xx 5 5 24 3a 5314r 2

1-16 Expand and simplify 1. (-6ab)(0.5ac) 3. 2x(x 5) 5. 2(4 3a) , 5(31-4)-(r\' + 2) _ 2t(r-3)

Solution

1) (-6ab)(.5ac)

we have to multiply these two. number will be multiplied with number and variable will be multiplied with variable.

(-6 * 0.5)(ab * ac)

-3a²bc

2) -(2x²y)(-xy⁴)

2x³y⁵   (minus multiplied with minus gives plus)

3) 2x(x-5)

2x*x - 2x*5

2x² - 10x

4) (4-3x)x

4*x - 3x*x

4x - 3x²

5) -2(4- 3a)

-2*4 - (-2)*3a

-8 + 6a

6) 8 - (4 + x)

8 - 4 - x

4 - x

7) 4(x²-x+2) -5(x²-2x+1)

4x² -4x +8 -5x² +10x -5

4x² -5x² -4x +10x +8 -5

-x² +6x +3

8) 5(3t-4) -(t²+2) -2t(t-3)

15t - 20- t² - 2 - 2t² + 6t

-3t² + 21t - 22