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Otrada [13]
3 years ago
14

Factorising quadratics All questions please to be completed. I’m stuck.

Mathematics
1 answer:
Alex777 [14]3 years ago
5 0

Answer:

1. (x +1)(x - 1)

2. (x+5)(x-5)

3. (x+12)(x-12)

4. (x+14)(x-14)

5. (x+5)(x-7)

Step-by-step explanation:

The first 4 expressions can be factored with the difference of squares type of factoring.

For #5, the odd one out is (x+5)(x-7) because it isn't a factor of any of the standard form equations, while the others are

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4 (1/2x 7) = 12. what is x. can someone do the whole answer with the work?
alina1380 [7]
4(1/2x7)=12 <=> x28/2=12
x=12*2/28=24/28=12/14=6/7
8 0
3 years ago
Could you explain why the answer 125 was supposed to be negative while my answer 81 was correct?
hichkok12 [17]

Answer:

Step-by-step explanation:

Realize what (-5)^3 means

(-5)(-5)(-5)

25(-5)

-125

meanwhile

(-9)^2 is

(-9)(-9)

81

Basically a negative times a negative is always positive, but when a negative number is cubed (or raised to any odd exponent for that matter) the product will be negative.

5 0
2 years ago
Why is (x-3) NOT a factor of x3+2x2-5x-6
ivolga24 [154]

As the expression is not equal to zero on x=3, x-3 is not a factor of given expression

Step-by-step explanation:

Given expression is:

x^3+2x^2-5x-6

We have to check if x-3 is a factor of given expression

In order for x-3 to be a factor of expression, we have to put x-3 = 0 => x=3 in expression.

If the expression is zero at x=3 then x-3 is a factor of expression otherwise not.

So putting x=333 in expression

=(3)^3+2(3)^2-5(3)-6\\= 27+2(9) - 15-6\\= 27+18-15-6\\= 45-21\\=24 \neq 0

As the expression is not equal to zero on x=3, x-3 is not a factor of given expression

Keywords: Polynomials, expressions

Learn more about polynomials at:

  • brainly.com/question/4228574
  • brainly.com/question/4279146

#LearnwithBrainly

8 0
3 years ago
Which of the following could be represented by -8?
xz_007 [3.2K]
The only possible answer is A : -8
all of the rest are positive answers
3 0
2 years ago
Read 2 more answers
48% of the children in a summer camp are boys. If there are 1536 boys, how many children are there in the summer camp?
Ket [755]

Answer:

3200

Step-by-step explanation:

1536/48 = 32

32x100 = 3200

3 0
2 years ago
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