Question

If (a - b) = 0.9 and ab = 0.36 find the value of a +b and a square minus b square. ​

Answer 1

Answer:

a^2+b^2=1.53

a+b=17

Step-by-step explanation:

squaring on (a-b)^2

=a^2-2ab+b^2

(0.9)^2=a^2-2×0.36+b^2

0.81=a^2-0.72+b^2

0.81+0.72=a^2+b^2

1.53=a^2+b^2

1.53=(a+b) (a-b)

1.53=(a+b)×0.9

1.53÷0.9=(a+b)

a+b=17