Question

draw the graph of
${x}^{2} - 3x - 4$
​

Answer 1

Given y = x2 -3x + 4. let x = 0, 1, 2, 3 then y = 4,2,2,4and so on then the graph is

Answer 2

${x}^{2} - 3x - 4 \\ = x {}^{2} -4x + x - 4 \\ = x(x - 4) + 1(x - 4) \\ = (x + 1)(x - 4) \\ = so \: if \: x + 1 = 0 \\ then \: x = - 1 \\ =or \: thus \: x = - 4$