Question

What are the x-intercepts of the graph of the function f(x) =x^2+5x-36 including your work on it if possible pls.

Answer 1

${x}^{2} + 5x - 36 \\ = {x}^{2} + 9x - 4x - 36 \\ = x(x + 9) - 4(x + 9) \\ = (x + 9)(x - 4) \\ \\ \\ intercept \: on \: x \: axis \: are \: - 9 \: and \: 4$