Math, asked by bookbookis105, 11 months ago

Expand using suitable identity (-4x+5y-9z)^2

Answers

Answered by thentuvaralakshmi

5

Answer::

(a+b+c)² = a²+b²+c² +2ab+2bc +2ac

(-4x+5y-9z)²

= (-4x)² + (5y)² + (-9z)² +2(-4x)(5y) + 2(5y)(-9z) + 2(-4x)(-9z)

= 16x² +25y² + 81z² -40xy -90yz + 72xz

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