Question

solve 87*97 using identity

Answer 1

Answer:

8439

Step-by-step explanation:

$87 \times 97 \\\\= (100-3)(100-13)\\\\= 100^2 + (-3-13)100 + (-3)(-13)\\\\= 10000 + (-16)100 + 39\\\\= 10000 - 1600 + 39\\\\= \large \underline{\boxed{\boxed{\bold{8439}}}}$

Hope it helps.

Answer 2

Hey Mate
Here is your answer
87*97
=(100-3)-(100-13)
=100²+(-3-13)100+(-3)(-13)
=10000-1600+39
=8400-39
=8439

HOPE IT IS HELPFUL MATE!!!!