Question

8. 1 In each of the examples given bel
determinen whether the valdes gives
against the quadratic equation opre
roots of the
e equation - or not
i) x² + 3 re - 4 = 0 x = 1, -2, -3



PLEASE ANSWER FAST​

Answer 1

Step-by-step explanation:

Let,

f(x) = x² + 3x - 4 = 0

The above values will be root if the f(x) is zero for the given values.

So, if x = 1 then,

f(1) = 1+3-4 = 0

if, x = -2 then,

f(-2) = 4-6-4 = -10+4 = -6.

and, if x = -3 then,

f(-3) = 9-9-4 = -4.

Here, for x = 1, f(x) = 0. So, x = 1 is the root of the equation.

But another values do not verify the conditions so x = -2 and x = -3 are not the roots of the equation.