Question

Without actually squaring, find the value of ( 89 sq - 88 sq )

Answer 1

Hey

$( {89}^{2} - {88}^{2} )$

$( {90 - 1)}^{2} - ( {90 - 2})^{2}$

$( {90}^{2} + {1}^{2} - 2 \times 90 \times 1) - ( {90}^{2} + {2}^{2} - 2 \times 2 \times 90)$

$(8100 + 1 - 180) - (8100 + 4 - 360)$

7921 - 7744

177

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Answer 2

Answer:

Step-by-step explanation:

(89)^2-  (88)^2

(89-88) x (89+88) |because (asq-bsq)x

1x177.                     |( asq+bsq)= asq-

                              |                   bsq

177 ANS.

Hope this will help you..