Question

solve for x: 7x^2 - 3x - 4 = 0

Answer 1

you can use the formula :)

Answer 2

can you show me how it's done step by step? i forget

Answer 3

when you have a equation like this:
ax^2 + bx + c = 0
you can use this formula:
\[x _{1,2} = \frac{ -b \pm \sqrt{b ^{2}-4ac} }{ 2a }\]

Answer 4

but you can solve it by the laws of mathematics too :)

Answer 5

i prefer to show you how to do that by the laws of mathematics

Answer 6

@sexychick

Answer 7

7x^2-3x-4=0
(7x+4)(x-1)=0
7x+4=0 or x-1=0
7x=-4 0r x=1
x=-4/7 or x=1
solutions are -4/7 and 1
hope that helps

Answer 8

@melbe , your explanation was nice but please explain \( \sf \large \color{green}{Step} \; \color{red}{by} \; \color{green}{step} \)