What is the value of c^2-d^2 if c+d=7 and c-d=-2?

Abhinava asked Jan 28, 2022

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5 votes

Abhinava asked Jan 28, 2022

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18 votes

Answer:

- 14

Explanation:

c² - d² ← is a difference of squares and factors as

= (c + d)(c - d) ← substitute values for factors

= 7 × - 2

= - 14

Voonic answered Feb 3, 2022

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