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Gekata [30.6K]
3 years ago
8

How to mark verified answer in brainly​

Mathematics
2 answers:
Andru [333]3 years ago
4 0

according to my knowledge.you can do nothing.the morderators check the answers and if you have given correct answer with proper explaination and remember you cant copy answers from other sources.then, your answers would get verified......

gogolik [260]3 years ago
3 0

Answer:

Ah Brainy Moderators do that..

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Answer:

<h3>           sum of the roots:    x_1+x_2=4\frac12</h3><h3>           product of the roots:     x_1x_2=-5             </h3><h3> Step-by-step explanation:</h3>

2x^2-9x-10=0\quad\implies\quad a=2\,,\ b=-9\,,\ c=-10

b^2-4ac=(-9)^2-4(2)(-10)=81+80=161>0

From Vieta's formulas applied to quadratic polynomial we have:

if    b^2-4ac\geqslant0   then

sum of roots:    x_1+x_2=-\dfrac ba=-\dfrac{-9}2=4\frac12

product of the roots:     x_1x_2=\dfrac ca=\dfrac{-10}2=-5

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