2 years ago

Can someone help me with this

Mathematics

1 answer:

antiseptic1488 [7]2 years ago

4 0

Answer:

[9 - 2 = 7 x 4] = {28}

[ ] =expression { } answer

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What is the sum of the roots of the polynomial shown below? f(x) = x^3 + 2x^2 - 11x-12

svp [43]

Answer:

Sum of the roots of the polynomial $x^{3}+2 x^{2}-11 x-12 \text { is }-2$

Solution:

The general form of cubic polynomial is $a x^{3}+b x^{2}+c x+d=0$ ---- (1)

If we have any cubic polynomial $a x^{3}+b x^{2}+c x+d=0$ having roots $\alpha , \beta , \theta$

Sum of roots $\alpha + \beta + \theta$ = $\frac{-b}{a}$ ---(2)

From question given that,

$x^{3}+2 x^{2}-11 x-12$ --- (3)

On comparing equation (1) and (3), we get a = 1, b = 2, c = -11 and d = -12

Hence the sum of roots using eqn 2 is given as,

= $\frac{-2}{1}$

= -2

Hence the sum of the roots of the polynomial $x^{3}+2 x^{2}-11 x-12 \text { is }-2$

4 0

2 years ago

Help please will give the brainliest

Mice21 [21]

Answer:

Every angle of Square = 90°

diagonal bisects the angle in half.

=> angle FGI = 45°

=> 7x+3=45

=>7x=42

therefore, x=42/7=6

5 0

3 years ago

Read 2 more answers

Are these ratios equivalent?

zhenek [66]

No because 5/2= 2,5 however 63/19=3,66...

7 0

2 years ago

Estimate the difference by rounding each number to the nearest half or whole. 7 1/15 - 3 4/5

bearhunter [10]

7 1/15 to the nearest whole would be 7. 3 4/5 to the nearest whole would be 4.

7 – 4 = 3

3 0

3 years ago

Halla las dimensiones de un rectángulo de 48 cm2 de área sabiendo que es 2 cm más ancho que alto

Sloan [31]

Answer:Alto 16cm Ancho 32cm

A+2A=48

3A=48

A=16

Step-by-step explanation:

7 0

2 years ago