Question

Without directly multiplying evaluate 0.64x0.64-0.36x0.36​

Answer 1

Answer:

0.64×0.64-0.36×0.36

=(0.64)²-(0.36)²

applying a²-b²=(a+b)(a-b)

we get

(0.64+0.36)(0.64-0.36)

=1×(0.28)

=0.28

Answer 2

0.64 × 0.64 - 0.36 × 0.36 = 0.28

Given :

The expression 0.64 × 0.64 - 0.36 × 0.36

To find :

The value of the expression

Solution :

Step 1 of 2 :

Write down the given expression

The given expression is 0.64 × 0.64 - 0.36 × 0.36

Step 2 of 2 :

Find the value of the expression

Use the formula a² - b² = ( a + b ) ( a - b )

$\sf 0.64 \times 0.64 - 0.36 \times 0.36$

$\sf = {(0.64)}^{2} - {(0.36)}^{2}$

$\sf = (0.64 + 0.36 )\times (0.64 - 0.36)$

$\sf = 1\times 0.28$

$\sf = 0.28$

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