Question

(1) x2 - 7x + 5 = 0
using valuof a bc​

Answer 1

Answer:

a+b+c =0

3abc

3(x2)(-7x)(5)

= -210 x

Step-by-step explanation:

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Answer 2

${x}^{2} - 7x + 5$

a = 1

b = -7

c = 5

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

$x = \frac{ - ( - 7) ± \sqrt{ {( - 7)}^{2} - 4(1)(5) } }{2(1)} \\ x = \frac{7 ± \sqrt{49 - 20} }{2} \\ x = \frac{7 ± \sqrt{29} }{2}$

abc = (1)(-7)(5)

abc = -30

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