SOLUTION: use quad formula to solve 5x^2-7x-3=0

Question 884370: use quad formula to solve 5x^2-7x-3=0

Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!

Start with the given equation.

Notice that the quadratic is in the form of where , , and

Let's use the quadratic formula to solve for "x":

Start with the quadratic formula

Plug in , , and

Negate to get .

Square to get .

Multiply to get

Rewrite as

Add to to get

Multiply and to get .

or Break up the expression.

So the exact solutions are or

Use a calculator to get these approximate solutions (note: you evaluate the exact solutions to get the approximate solutions)

or
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