Question

factorise 2n^2 - n - 45​

Answer 1

Answer:

Given, 2n² - n - 45=0

So, Multiplying 2 from n² with 45 to get 90 for getting our answer to be factorised.

2n²-10n+9n-45=0

2n(n-5)+9(n-5)=0

(2n+9) (n-5) =0

So, We have n= (-9/2 , 5)

Answer 2

Answer:

$\large\boxed{\textsf{\textbf{\blue{QUESTIONS\::-}}}}$

1. add 5 upon 6 , -1 upon 10

2.subtract -8/9 from -3/5

3. what number should be added to -1 so as to get 5 /7.

4. two numbers are in ratio 8:3.if the sum of the number is 143, find the number.

5. 8x +3=27+2x

6.find which of the following number is a perfect square

a) 576 b) 11025