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Simplify the following expression: ​(3.2×3.2−0.2×0.2)(0.2×0.2−2×0.2×3.2+3.2×3.2)\frac{(3.2×3.2-0.2×0.2)}{(0.2×0.2-2×0.2×3.2+3.2×3.2)}(0.2×0.2−2×0.2×3
Question

Simplify the following expression:
(3.2×3.20.2×0.2)(0.2×0.22×0.2×3.2+3.2×3.2)\frac{(3.2×3.2-0.2×0.2)}{(0.2×0.2-2×0.2×3.2+3.2×3.2)}​​

A.

1315\frac{13}{15}​​

B.

1915\frac{19}{15}​​

C.

1715\frac{17}{15}​​

D.

1115\frac{11}{15}​​

Correct option is C

Given:
Simplify the expression:

(3.2×3.20.2×0.2)(0.2×0.22×0.2×3.2+3.2×3.2)\frac{(3.2 \times 3.2 - 0.2 \times 0.2)}{(0.2 \times 0.2 - 2 \times 0.2 \times 3.2 + 3.2 \times 3.2)}

Formula Used:

a2b2=(ab)(a+b)a^2 - b^2 = (a-b)(a+b)

(ab)2=a2+b22ab(a - b)^2 = a^2 + b^2 - 2 ab​​

Solution:

Let, a = 3.2, b = 0.2

(3.20.2)(3.2+0.2)(3.20.2)2\frac{(3.2 - 0.2) (3.2 + 0.2)}{(3.2 - 0.2)^2}

(3.2+0.2)(3.20.2)\frac{(3.2 + 0.2)}{(3.2 - 0.2)}

=  3.43\frac{3.4}{3}

1715\frac{17}{15}

Thus, the correct optikon  is (c)

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