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4 votes
Solve for x. Write both solutions, separated by a
comma.
7x2 - 4x - 3=0

User Telma
by
7.4k points

1 Answer

3 votes

Answer:

x = - 3/7 or x = 1

Explanation:

7x² - 4x - 3 = 0

Rewrite - 4x as a difference

That's

7x² - 7x + 3x - 3 = 0

Factorize the expression

7x( x - 1) + 3 ( x - 1) = 0

(7x + 3)( x - 1 ) = 0

7x + 3 = 0 x - 1 = 0

7x = - 3 x = 1

x = -3/7

The solutions are

x = - 3/7 or x = 1

Hope this helps you

User Andrew Brower
by
7.3k points