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3 years ago

P(x)=x(2x+5)(x+1)What are the zeros of this polynomial

Mathematics

1 answer:

erastova [34]3 years ago

5 0

Answer:

(0,-5/2,-1)

Step-by-step explanation:

x(2x+5)(×+1)=0

x=0 2x+5=0 x+1=0

2x=-5 x=-1

x=-5/2

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A class is taking a trip to the museum. The teacher finds that for every 3 students who brought a bag lunch, 2 students will buy

Lilit [14]

Answer:

Step-by-step explanation:

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3 years ago

Reduce 105 in the ratio 3:5

Komok [63]

9514 1404 393

Answer:

39.375 : 65.625

Step-by-step explanation:

The meaning of "reduce" in this context is unclear. We assume you want to divide the quantity 105 into parts that have a ratio of 3 : 5. Then the smaller part will be 3/(3+5) = 3/8 of the total; the larger part will be 5/8 of the total.

3/8 × 105 = 39 3/8

5/8 × 105 = 65 5/8

The divided quantities are ...

39.375 : 65.625

3 0

3 years ago

Determine the value of "a" for which g(h(a)) = 13

kykrilka [37]

Answer:

a = 6

Step-by-step explanation:

g(x) = 5x - 2

h(x) = √(x + 3)

g(h(x)) = 5 $\sqrt{x+3}$ - 2

g(h(a)) = 5 $\sqrt{a+3}$ - 2

5 $\sqrt{a+3}$ - 2 = 13

5 $\sqrt{a+3}$ = 15

$\sqrt{a+3}$ = 3

( $\sqrt{a+3}$ )² = 3²

a + 3 = 9

a = 6

5 0

2 years ago

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3 years ago

X^2 + 1/2x + = 2 + Help please

Gennadij [26K]

Answer:

Step 2:

For Completing the square,

$(\frac{1}{2} coefficient\ x)^{2} =(\frac{1}{2}\times \frac{1}{2})^{2}=\frac{1}{16}$

Add half coefficient of x square on both the side we get

$x^{2}+\dfrac{x}{2}+\frac{1}{16}=2+\frac{1}{16}$

Step-by-step explanation:

Solve:

$2x^{2}+x-4=0$

$2x^{2}+x=4$

Solution:

Step 1:

Dividing both the side by two we get

$x^{2}+\dfrac{x}{2}=2$

Step 2:

For Completing the square,

$(\frac{1}{2} coefficient\ x)^{2} =(\frac{1}{2}\times \frac{1}{2})^{2}=\frac{1}{16}$

Add half coefficient of x square on both the side we get

$x^{2}+\dfrac{x}{2}+\frac{1}{16}=2+\frac{1}{16}$

Step 3:

We know $(a +b)^{2} = a^{2}+2ab +b^{2}$

$(x+\frac{1}{4})^{2}=\frac{33}{16} \\ \\(x+\dfrac{1}{4})=\pm \sqrt{\dfrac{33}{16}} \\\\x=-\dfrac{1}{4}\pm \sqrt{\dfrac{33}{16}}$

6 0

4 years ago