Math, asked by purbasha776, 9 months ago

plz someone help me to do this no.​

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Answers

Answered by tahseen619
2

13

Given:

a+b = 7

ab = 12

To find:

- ab +

Solution:

- ab +

(a + b)² - 2ab - ab

(a + b)² - 3ab

(7)² - 3.12

49 - 36

13

The required answer is 13.

Answered by Anonymous
3

Answer:

let the two numbers be a,b

given,

sum of two numbers = 7

=>a+b=7

product of two numbers =12

=>ab=12

=>a(7-a)=12

7a-a²=12

a²-7a+12=0

a²-4a-3a+12=0

a(a-4)-3(a-4)=0

(a-3)(a-4)=0

=>a=3,4

subtitle in first equation

we get b=4,3

now, we need to find

a²-ab+b²

(3)²-3(4)+(4)²

9-12+16

=13

Hope it helps you.

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