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3 years ago

6

Expand this equation 2x(5x-2)

1 answer:

m_a_m_a [10]3 years ago

5 0

Answer:

10x^2-4x

Step-by-step explanation:

We will have to open the bracket first

So let's solve

2x(5x-2)

10x^2-4x

Since we are not asked to solve further so we will have to leave he final answer as 10x^2-4x

But in the case where a certain value is given to substitute for x we will have to solve further

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Question is there below

emmainna [20.7K]

Answer:

$-\frac{bc}{a^{2} }$

Step-by-step explanation:

We are given $f(x)=ax^{2} +bx+c$ , $\alpha$ and $\beta$ are zeros of the function. We can use the sum and product of roots. You may have come across these equations before ↓

$\alpha +\beta =-\frac{b}{a}$

$\alpha \beta =\frac{c}{a}$

Since the coefficients are already in a, b, and c's, we do not need to sub in anything else.

Now, you are asked to evaluate $\alpha ^{2} \beta +\alpha \beta ^{2}$ . The next step after finding the roots above ↑, is to factorise this equation to be solved.

$\alpha ^{2} \beta +\alpha \beta ^{2}$

= $\alpha \beta (\alpha +\beta )$

Sub in each respective roots,

= $\frac{c}{a} (-\frac{b}{a} )$

= $-\frac{bc}{a^{2} }$

Hope this helped! Ask me if there's any part of the working you don't understand :)

5 0

4 years ago

Compare the quantity in Column A with the quantity in column B. Choose the best answer.

spayn [35]

Answer:

The quantity in collum B is bigger.

Step-by-step explanation:

6 0

4 years ago

Read 2 more answers

Robin had a 5 meter length of ribbon to use bows for her holiday gifts . She wanted to know how many 1/5 meter long pieces she c

GaryK [48]

Answer: She will cut 25 pieces

Step-by-step explanation:

The total length = 5 m

She want to o cut many 1/5 meter long pieces from the ribbon

pieces she can cut from the ribbon will be

5 ÷ 1/5 = 5 × 5 = 25 pieces

6 0

3 years ago

Read 2 more answers

Reduce to simplest form.

Shkiper50 [21]

Answer:

11/6

Step-by-step explanation:

$\dfrac{6}{3}+\left(-\dfrac{1}{6}\right)=\dfrac{12}{6}-\dfrac{1}{6}=\dfrac{12-1}{6}\\\\=\boxed{\dfrac{11}{6}}$

As a mixed number, this is 1 5/6.

3 0

3 years ago

Please help tysm ill mark brainliest

liraira [26]

Answer:

use pemdas(order of the operations)and you'll get the answer 27!!

Step-by-step explanation:

5 0

2 years ago