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प्रश्न
Add the following expression:
− 17x2 − 2xy + 23y2, − 9y2 + 15x2 + 7xy and 13x2 + 3y2 − 4xy
उत्तर
(− 17x2 − 2xy + 23y2) + (− 9y2 + 15x2 + 7xy) + (13x2 + 3y2 − 4xy)
= − 17x2 − 2xy + 23y2 − 9y2 + 15x2 + 7xy + 13x2 + 3y2 − 4xy
= − 17x2 + 15x2 + 13x2 − 2xy − 4xy + 7xy + 23y2 + 3y2 − 9y2
= 11x2 + xy + 17y2
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