Question

if a-b=0.9 and ab=0.36 find

1)a+b 2)a²-b²​

Answer 1

Step-by-step explanation:

We have,

a-b=0.9

(a-b)^2=(0.9)^2=0.81

a^2+b^2-2ab=0.81

a^2+b^2-2ab+4ab=0.81+4ab

a^2+b^2+2ab=0.81+4ab

(a+b)^2=0.81+4ab

(a+b)^2=0.81+4(0.36)             Adding same number on both                            

                                                the sides. Also ab=0.36

(a+b)^2=2.25

a+b=1.5

Then,

a^2-b^2

=(a+b)(a-b)

=(1.5)(0.9)

=1.35

Answer 2

Answer:

1.35

Step-by-step explanation:

l will find from Google

thanks