Question

Answer it fast as much as early. plz a humble request

Answer 1

(0.56*0.56 -0.21*0.21)/(0.56+0.21)
(0.56)^2 -(0.21)^2 / (0.56+0.21)
(0.56+0.21)(0.56-0.21)/(0.56+0.21)
(0.56-0.21)= 0.35

Answer 2

We know that a² - b² = (a + b) × (a - b)

⇒ (0.56 × 0.56) - (0.21 × 0.21) = (0.56 + 0.21) × (0.56 - 0.21)

⇒ $\frac{0.56^2 - 0.21^2}{0.56 + 0.21} = \frac{(0.56 + 0.21) (0.56 - 0.21)}{(0.56 + 0.21)}$

⇒ Answer = 0.56 - 0.21 = 0.35