Question

If a+b = 23 , a-b = 7 , find a^2+b^2 and ab​

Answer 1

Answer:

35 is the answer. Please mark me on brainly

Answer 2

Answer:

a+b= 23

a-b= 7

a^2+b^2={(a+b)^2+(a-b)^2}/2

=(23^2+7^2)/2

=(529+49)/2

=578/2

=289

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

=(23/2)^2-(7/2)^2

=(23/2+7/2)(23/2-7/2)

=(30/2)(16/2)

=15×8

=120