Question

a+b=4 and ab=-12 , find 1.) a-b 2.)a^2-b^2

Answer 1

Answer:

(a+b)=4

s.o.b.s

(a+b) square=16

ab =-12

multiply by 2,

2ab=-24

4ab=-48

we know that

(a+b) square-4ab=(a-b) square

16-(-48)=

64= (a-b) square

#a-b ={plus or minus}8

#a square minus b square = (a+b)(a-b)

4(+8)

=32

or

4(-8)

=-32

Step-by-step explanation:

gog it