Question

if a-b=0•9andab=0•36finda+b a square -b square​

Answer 1

Answer:

a²-b²=(+/-)1.35 and (a+b)=(+/-) 1.5

Step-by-step explanation:

here given that a-b=0.9 and ab=0.36

here we know that

(a-b)²=a²+b²-2ab

then (0.9)²=a²+b²-2×0.36

a²+b²=0.81+0.72= 1.53

(a+b)²=a²+b²+2ab

(a+b)²=1.53+2×0.36

(a+b)²=2.25

(a+b)=(+/-) 1.5

a²-b²=(a+b)(a-b)= 1.5×0.9

a²-b²=1.35