Question

split the middle term 2 x square - 7 x +-1​

Answer 1

Step-by-step explanation:

in this question we can use quadratic formula instead of middle term split

${b}^{2} - 4ac$

$= {( - 7)}^{2} - 4 \times 2 \times ( - 1)$

$= 49 + 8$

$= 57$

so this equation has two real and distinct roots

now applying quadratic formula which is

$x = \frac{ - b \frac{ + }{ - } \sqrt{ {b}^{2} - 4ac } }{2a }$

$x = \frac{ - ( - 7) \frac{ + }{ - } \sqrt{57} }{2 \times 2}$

$x = \frac{7 + \sqrt{57} }{4} or \: x = \frac{7 - \sqrt{57} }{4}$

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Answer 2

Step-by-step explanation:

$refer \: to \: the \: attached \: file$

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