x square - 11 x minus 42
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Answered by
6
x² - 11x - 42,
x² - (14-3)x - 42,
x²-14x+3x-42,
x(x-14)+3(x-14),
(x-14)(x+3)
x² - (14-3)x - 42,
x²-14x+3x-42,
x(x-14)+3(x-14),
(x-14)(x+3)
Answered by
10
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
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
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