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Popular >

expand (r-1)^2

Solution

expand

(r - 1)^{2}

Solution

r^{2} - 2 r + 1

Solution steps

(r - 1)^{2}

Apply Perfect Square Formula:

(a - b)^{2} = a^{2} - 2 ab + b^{2}

(r - 1)^{2} = r^{2} - 2 r \cdot 1 + 1^{2}

= r^{2} - 2 r \cdot 1 + 1^{2}

Simplify

r^{2} - 2 r \cdot 1 + 1^{2} : r^{2} - 2 r + 1

= r^{2} - 2 r + 1

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Frequently Asked Questions (FAQ)

What is expand (r-1)^2 ?
The solution to expand (r-1)^2 is r^2-2r+1