Question

1.
Solve the quadratic equation using quadratic formula :

x2 – 7x + 12 = 0​

Answer 1

Answer:

Step-by-step explanation:

The quadratic formula is

$x=\frac{-b+/-\sqrt{b^2-4ac} }{2a}$

For us, a = 1, b = -7, and c = 12. Filling in the formula then looks like this:

$x=\frac{7+/-\sqrt{(-7)^2-4(1)(12)} }{2(1)}$ which simplifies to

$x=\frac{7+/-\sqrt{49-48} }{2}$ and

$x=\frac{7+/-\sqrt{1} }{2}$ and

$x=\frac{7+1}{2}=\frac{8}{2}=4$ or

$x=\frac{7-1}{2}=\frac{6}{2}=3$

Th 22 solutions are x = 3 and x = 4.