Question

x square - 11 x minus 42

Answer 1

x² - 11x - 42,

x² - (14-3)x - 42,

x²-14x+3x-42,

x(x-14)+3(x-14),

(x-14)(x+3)

Answer 2

x² - 11x - 42

By splitting the middle term method,

x² - 11x - 42

= x² + 14x - 3x - 42

= x(x + 14) - 3(x + 14)

=> (x - 3)(x + 14)


To factorise the equation in the form of
ax² + bx + c, find two numbers whose sum is equal to b and product equal to ac.

Hope you understand