kyliegriffis

27.06.2019 • 

Mathematics

A. what is the sum of the squares of the roots of $x^2 - 5x - 4 = 0$? b. one root of $x^2 + 12x + k = 0$ is twice the other root. find $k.$ c. what is the sum of the roots of the quadratic $4x^2 - 4x - 4$? d. jimmy is trying to factor the quadratic equation $ax^2 + bx + c = 0.$ he assumes that it will factor in the form \[ax^2 + bx + c = (ax + b)(cx + d),\]where $a,$ $b,$ $c,$ and $d$ are integers. if $a = 4,$ and jimmy wants to find the value of $a,$ what are the possible values he should check, in order to find $a$? e. brandy is trying to factor the quadratic $3x^2 - x - 10.$ she starts by assuming that the quadratic factors as \[3x^2 - x - 10 = (x + b)(3x + d),\]for some integers $b$ and $d.$ after some work, brandy successfully factors the quadratic. find the ordered pair $(b,d).$

Ответ:

artursino

10.03.2022

Mathematics

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A. 33

B. k=32

C. 1

D.

E.

Step-by-step explanation:

In all parts for the quadratic equation use Vieta's formulas

where are the roots of the quadratic equation.

A. For the equation

Then

B. One of the roots of is twice the other root, then By the Vieta's formulas,

Then and

C. The sum of the roots of the quadratic   is

D. Note that

then If are integers, then you should check

E. Consider Note that

Then

Then hence

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Ответ:

mxrvin7383

07.01.2020

Mathematics

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153.94 is the answer
The rules are
A= pi•r2

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