Question

The zeros
of
the
quadratic
expression x² + 2x-143..​

Answer 1

$\huge\sf\pink{Answer}$

☞ Zeros of the above expression are 11 and (-13)

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$\huge\sf\blue{Given}$

✭ P(x) = x²+2x-143

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$\huge\sf\gray{To\:Find}$

☆ Zeros of the quadratic polynomial.

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$\huge\sf\purple{Steps}$

➝ x²+2x-143 = 0

➝ x²+13x-11x-143 = 0

➝ (x²-11x) +(13x-143) = 0

➝ x(x-11)+13(x-11) = 0

➝ (x-11)(x+13) = 0

Either (x-11) = 0

$\sf\orange{\dashrightarrow x = 11}$

Either (x+13) = 0

$\sf\orange{\dashrightarrow x = (-13)}$

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Some important formulas:

➳ (a+b)² = a²+b²+2ab

➳ (a-b)² = a²+b²-2ab

➳ (a+b)(a-b) = a²-b²

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