Question

1.9×(5b-4a+3)2.-10(4k-5m+10)3.12-(3-4b)4.10(a+3)-45.-7a(b+1)-2(3b-4)​

Answer 1

Ответ:

1. 9(5b-4a+3)=45b-36a+27

2. -10(4k-5m+10)=-40k+50m-100

3. 12-(3-4b)=12-3+4b=9+4b

4. 10(a+3)-4=10a+30-4=10a+26

5. -7a(b+1)-2(3b-4)=-7ab-7a-6b+8

Answer 2

1. 1.9×(5b-4a+3) = 1.9×5b - 1.9×4a + 1.9×3 = 9.5b - 7.6a + 5.7

2. -10(4k-5m+10) = -10×4k + 10×5m - 10×10 = -40k + 50m - 100

3. 12-(3-4b) = 12 - 3 + 4b = 9 + 4b

4. 10(a+3)-45 = 10×a + 10×3 - 45 = 10a + 30 - 45 = 10a - 15

5. -7a(b+1)-2(3b-4) = -7ab - 7a - 6b + 8