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2 years ago

2x+4 algebraic expression

Mathematics

2 answers:

NISA [10]2 years ago

6 0

Answer:

2 (x + 2 ) I think I'm right

likoan [24]2 years ago

3 0

2x+4 will be like this: take out the common number, that can be divided by both 2 and 4, which is 2. So you put 2 and then open parentheses and divide both 2 and 4 by 2. It will look like this => 2(1x+2) or 2(x+2)

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Find the product and sum of the roots of the equation:<br> 2x^2-9x-10=0

BabaBlast [244]

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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2 years ago

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Elena-2011 [213]

<h3>Answer: D) 0</h3>

Work Shown:

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