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Maslowich
3 years ago
15

SIMPLIFY THIS POLYNOMIAL EXPRESSION: 4 (5X2 + 2) - (-4X2 + 7). + (- 3X2-5)

Mathematics
2 answers:
GarryVolchara [31]3 years ago
8 0

Answer:

21x^2-4

Step-by-step explanation:

lana66690 [7]3 years ago
5 0

Answer:

6x^2-10

Step-by-step explanation:

You add like terms. All the x^2 you add them and you add together the ones that are not multiplied by x. Make sure to distribute the negative.

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3 years ago
If f(x)= 2x^2+1, what is f(x) when x=3
givi [52]

Hey there!

f(x) = 2x^2 + 1

y = 2x^2 + 1

y = 2(3)^2 + 1

3^2

= 3 * 3

= 9

y = 2(9) + 1

2(9) = 18

y = 18 + 1

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Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

8 0
3 years ago
The length of a rectangle is three more than twice it’s width. The perimeter of the rectangle is 246 cm. Write an equation to fi
myrzilka [38]

Answer:

83 cm

Step-by-step explanation:

Let the length of the rectangle be L cm and the width be W cm.

L= 2W +3 -----(1)

Perimeter of rectangle= 2(length) +2(width)

2L +2W= 246 -----(2)

Substitute (1) into (2):

2(2W +3) +2W= 246

Expand:

4W +6 +2W= 246

Simplify:

6W +6= 246

Divide both sides by 6:

W +1= 41

W= 41 -1

W= 40

∴ width of the rectangle is 40cm.

Substitute value of W into (1):

L= 2(40).+3

L= 80 +3

L= 83

Thus, the length of the rectangle is 83 cm.

8 0
3 years ago
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