Question

Add 2x² + 3y + z; 4x² + 3z, 2z – 3y and -2y + 5x​

Answer 1

Answer:

Step-by-step explanation:

Heya dear user !!!

Here is your answer,

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We know that

(a+b+c)² = a² + b² + c² + 2(ab + bc + ca)

So,

(-2x + 5y - 3z)²

= (-2x)² + (5y)² + (-3z)² + 2 [ (-2x)*5y + 5y*(-3z) + (-3z)*(-2x) ]

= 4x² + 25y² + 9z² + 2 [ (-10xy) + (-15yz) + 6xz ]

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

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Hope it helps.