Question

Q10. Using identity evaluate:
298 x 302​

Answer 1

Answer:

By accociate property

(300-2)×(300+2)

300 × (-2+2)

300× (0)

0

Answer 2

298 × 302 = 89996

Given :

The expression 298 × 302

To find :

The value of the expression

Solution :

Step 1 of 2 :

Write down the given expression

The given expression is 298 × 302

Step 2 of 2 :

Find the value of the expression

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

$\sf 298 \times 302$

$\sf = 302 \times 298$

$\sf = (300 + 2) \times (300 - 2)$

$\sf = {300}^{2} - {2}^{2}$

$\sf = 90000 - 4$

$\sf = 89996$

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