Question

check whether x^2+3x-4=0 is a quadratic equation​

Answer 1

Answer:

Yes x² + 3x -4 = 0 is a quadratic equation because it gives two answers for x that is x1 = -4 , x² = 1.

Step-by-step explanation:

Solving the quadratic equation x² + 3x - 4 = 0

x² + 3x - 4 = 0

1) Write as a difference.

x² + 4x - x - 4 = 0

2) Factor out x from the expression and then the negative sign.

x ( x + 4 ) - ( x + 4 ) = 0

3) Factor out ( x + 4 ) from the expression.

( x + 4 ) ( x - 1 ) = 0

4) Split into possible cases...

x + 4 =0 => x1 => -4

x - 1 = 0 => x2 => 1

Hence solved ✅✅✅