Question

Expand the following : (3x -y + z)²

Answer 1

Hey mate here is your answer;

Expansion of the expression (3-y+z)^2

We develop (3-y)^2 with the binomial's formula.

We expand the following binomial formula: (a-b)^2=a^2-2*a*b+b^2

By replacing a by `3` and b by `y`,

we get: `y^2+2*3*(-y)+3^2`

We develop `(3-y+z)^2` with the binomial's formula.

We expand the following binomial formula: `(a+b)^2=a^2+2*a*b+b^2`

By replacing a by `3-y` and b by `z`,

we get: `z^2+2*3*z-2*y*z+y^2+2*3*(-y)+3^2`

`(3-y+z)^2=z^2+2*3*z-2*y*z+y^2+2*3*(-y)+3^2`

⭐I hope it helps you bestie ⭐☺️

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