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ch4aika [34]
3 years ago
10

Find the sum: (3x2 + 5x − 8) + (5x2 − 13x − 5)

Mathematics
2 answers:
musickatia [10]3 years ago
7 0

Answer:

(3x^2+5x-8)+(5x^2-13x-5)=8x^2-8x-13

Step-by-step explanation:

The given polynomials are,

3x^2+5x-8,5x^2-13x-5

In polynomial addition and subtraction only like terms can be added or subtracted.

So,

=(3x^2+5x-8)+(5x^2-13x-5)

=3x^2+5x-8+5x^2-13x-5

=3x^2+5x^2+5x-13x-8-5

=8x^2-8x-13

BartSMP [9]3 years ago
5 0

8x^2 - 8x - 13 hope this helps



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nikdorinn [45]

To solve this you must use the rules of PEMDAS (Parentheses, Exponent, Multiplication, Division, Addition, Subtraction)

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Which expression is equivalent to (3-5x)(3+5x)​
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3 years ago
Zubin has two pieces of string. One piece is 36 inches long and the other is 48 inches long. He wants to cut them into equal pie
skelet666 [1.2K]

Answer:

12 pieces each:

S_1 = 3\ in

S_2= 4\ in

Step-by-step explanation:

Given

S_1 = 36\ in -- first string

S_2 = 48\ in --- second string

Required

Determine the number of equal pieces

To do this, we first calculate the HCF of the length of both pieces (36\ and\ 48)

36 = 2 * 2 * 3 * 3

48 = 2 * 2 * 2 * 2 * 3

Common\ prime\ factors = 2, 2\ and\ 3

The HCF is:

HCF = 2 * 2 * 3

HCF = 12

<em>Hence, he can cut both strings to 12 pieces each</em>

<em></em>

<em>Recall that </em>

S_1 = 36\ in

<em>The first string can then be cut in to 3 inches each (i.e. 36/12)</em>

S_2 = 48\ in

<em>The first string can then be cut in to 4 inches each (i.e. 48/12)</em>

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3 years ago
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