Question

(5x+7y+9z)² using identity​

Answer 1

Answer:

refer to attachment

Step-by-step explanation:

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Answer 2

Answer:

25x^2 +49y^2 +81y^2 +70xy+126yz+90xz

Step-by-step explanation:

= 5x^2 + 7y^2 + 9z^2 + 2*5x*7y + 2*7y*9z + 2*5x*9z [ (a+b+c) ^2 =a^2 +b^2 +c^2 +2ab+2bc+2ca]

=25x^2 +49y^2 +81z^2 +70xy+126yz +90xz

(5x+7y+9z)^2= 25x^2 +49y^2 +81z^2 +70xy+126yz+90xz.

HOPE YOU UNDERSTAND IT.

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