Question

expand using suitable identity
(-2x+5y-3z)^2
​

Answer 1

Step-by-step explanation:

4x^2 + 25y^2 + 9z2 - 2xy - 2yz + 2xz

Answer 2

ANSWER:- 4x² + 25y² + 9z² - 20xy - 30yz + 12zx

Step-by-step explanation:

=(-2x+5y-3z)²

= (-2x)²+(5y)²+(-3z)²+2.(-2x).(5y)+2.(5y).(-3z)+2.(-3z).(-2x) Using the formula, (a+b+c)²= a²+b²+c²+2.a.b + 2.b.c +2.c.a

= 4x² + 25y² + 9z² - 20xy - 30yz + 12zx

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