if x is equal to minus 2 and Y is equal to 1 by using identity find the value of the following
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if x is equal to minus 2 and Y is equal to 1 by using identity find the value of the following
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We know that, (x + y)(x² - xy + y²) = x³ + y³
Here,
By substituting the values in th identity we have,
(x + y)(x² - xy + y²) = x³ + y³
What is an Identity ?
An equation is called an identity if it is satisfied by any value that replaces its variables.
1] (x + y)² = x² + y² + 2xy
2] (x - y)² = x² + y² - 2xy
3] (x + y)(x - y) = x² - y²
4] (x + a)(x + b) = x² + (a + b)x + ab