Math, asked by preeta9399, 10 months ago

plzz answer this question....... This is the question of class 10 exercise 2.2
those who will answer will be Mark as brainlist..

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Answers

Answered by ShahnwazHussain1

$\underline{\boxed{\tt{\huge{\red{AnSwEr}}}}}$

$<marquee direction="left" behavior="slide" scrolldelay="5"> Step-by-step explanation:-</marquee>$

We have,

$\implies \: {x}^{2} - 2x - 8 \\ \implies \: {x}^{2} - 4x + 2x - 8 \\ \implies \: x(x - 4) + 2(x - 4) \\ \implies \: (x + 2) \: (x - 4) \\ \\ if \: f(x) = 0 \\ then. \: x + 2 = 0 \\ \: \implies x = - 2 \\ \\ if \: f(x) = 0 \\ then \: x - 4 = 0 \\ \implies \: x = 4.$

$\huge{\therefore x = -2, 4}}$

$\huge\pink{\mid{\underline{\overline{\tt Verify:-}}\mid}}$

$Let \: - 2 \: be \: \alpha and \: 4 \: be \: \beta . \\ \implies \: \alpha + \beta = \frac{ - b}{a} \\ \implies \: - 2 + 4 = - 2(- 2) \\ \implies \: 2 = 2. \\ (ii) \: Product of Zero \\ \implies \: \alpha \times \beta = \frac{c}{a} \\ \implies \: - 2 \times 4 = - 8 \\ \implies - 8 = - 8 \\ \: \:verified$

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