## anonymous one year ago Solve x2 + 4x − 12 = 0.

1. Nnesha

there are 4+ method to factor quadratic equation for this question AC method (headphone) would easy where you have to find 2 numbers when you multiply them you should get product of AC and when you add or subtract them you should get middle term

2. Nnesha

$\huge\rm Ax^2+Bx+C=0$ a=leading coefficient b=middle term c= constant term what is a and c in that eqaution ?

3. Nnesha

equation*

4. anonymous

x and -12 i think

5. Nnesha

nice leading coefficient is one $\rm 1x^2+4x-12$ so what two number you should multiply to get -12 but when you add them you should get 4

6. anonymous

am not sure

7. Nnesha

1 times -12 = -12 right but 1-12 =-11 but we need 4 now what other number you can multiply to get -12 ?

8. anonymous

is it 2 and -6

9. Nnesha

2 should be negative cus we need POSITIVE 4 -2 times 6 =-12 6-2=4

10. Nnesha

so factors are (x + number )(x+number)

11. anonymous

so the answer is -2 and -6

12. Nnesha

no.

13. Nnesha

not negative 6

14. Nnesha

wait do you have to solve for x or find factors ?

15. anonymous

x

16. anonymous

so i was right

17. Nnesha

no. factors are (x+ first number)(x+2nd number) set it equal to zero remember one of them is negativve

18. Nnesha

(x+6)(x+(-2)) now solve for x

19. Nnesha

x+(-2)= 0 x= ?