Question

+
12. What should be subtracted from 3a + 7b
10 to get
13. Find the value of following polynomials, when m = -2:
(i) 3m - 7
(ii) 2m2 + 5m - 3
(iii) 3m² + 2m² - 3m +5
14. What should be the value of n if 3x2 - x-n=6, where x = 1?​

Answer 1

Step-by-step explanation:

13)

i)3m-7=3(-2)-7

=-6-7

=-13

ii)2m²+5m-3=2(-2)²+5(-2)-3

=2(4)-10-3

=8-13

=-5

iii)3m²+2m²-3m+5=5m²-3m+5

=5(-2)²-3(-2)+5

=5(4)+6+5

=20+11

=31

14)3*2-x-n=6

6-(1)-n=6

5-n=6

n=-1

3x2-x-n=6

3(1)2-(1)-n=6

6-1-n=6

5-n=6

n=-1

I didn't understand in que no. 14 there is 3x2 or 3*2. if there is x then second ans is correct and if there is multiplication 1st ans is correct

though the both ans are same but there is difference in their method

also I think que no.12) is incomplete

plzzzzz mark me as brainliest. if my ans is satisfactory