3 years ago

What is -0.8a-8=0.2a ?

Mathematics

1 answer:

nikklg [1K]3 years ago

8 0

I hope this helps you

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BabaBlast [244]

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<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

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Step-by-step explanation:

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