Question

− − 2 = 1
− + + = 2
− 2 + = −2

Answer 1

Resposta:

The first step is factorisation. What two numbers add together to make 2 and multiply together to produce -8. After that dreaded mental arithmetic you arrive at the terms (x+4) and (x-2). As the equation states the components add up to a total of zero, you reach the following: x + 4 = 0 and x - 2 = 0. Basic algebra attains the answers x = -4 and x = 2.