SOLUTION: Using {{{ (a-b)^2 = (a+b)^2-4ab }}}
Find the Value of {{{ ((a-b)^2) }}} if {{{ a }}} and {{{ b }}} are the roots for {{{ y = x^2 + 5x - 7}}}
Algebra.Com
Question 978045: Using
Find the Value of if and are the roots for
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
The roots for are
and .
The rest of the solution to the question is several arithmetic steps.
, and recognize the formula for difference of squares.
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