Question

If a+b=-7 and ab=2, find the
value of a² +b²​

Answer 1

Answer:

as we know,

(a + b)² = a² + b² + 2ab

[substituting values]

(-7)² = a² + b² + 2(2)

49 = a² + b² + 4

49 - 4 = a² + b²

therefore, a² + b² = 45

Answer 2

Answer:

45

Step-by-step explanation:

a^2+b^2=(a+b)^2-2ab

=7^2-2*2

=49-4

=45