How do i solve 3k(squared)-14k-49.... like how do i factor it out

## How do i solve 3k(squared)-14k-49.... like how do i factor it out

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# 4 Answers

3k^2-14k-49=0

There are two ways you can solve quadratic equation:

1. To solve quadratic equation is means to find its zeros. Use the Quadratic formula. You will find two real solutions or zeros: 7 and -7/3.

2. By factoring:

first, multiply 3 by 49=147

next find factors of 147 that sum of factors is -14. It is -21 and 7.

next, 3k^2-21k+7k -49, next, (3k^2 -21k)+(7k-49)=3k(k-7)+7(k-7)=(k-7)(3k+7)

(k-7)(3k+7)=0, zero product property, k-7=0, k=7; 3k+7=0, k=-7/3.

3k^2 - 14 k - 7

(3k - 7) (k +7) = 0

3k -7= 0, k + 7=0

3k = 7

k = 3/7 or k = -7

3k

^{2}--> 3,149 --> 7,7

3*-7 + 1* 7 = -14 <-- -14k

Trial and error or the quadratic equation are the only 2 ways. You know the first terms in each set of parentheses will be 3k and k respectively. So your factored equation will look like this: (3k + ?)(k-?). You know the plus and the minus go in those
places because the constant B is negative. (Ax

^{2}+ Bx + C is the form of your formula, also known as quadratic form or standard form of a quadratic... just to explain the B constant.)
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