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Mamont248 [21]
4 years ago
9

Add the polynomias:(8x^2-5x+7)+(7x^3-3x)​

Mathematics
2 answers:
mezya [45]4 years ago
3 0

Answer:

7x^{3} + 8x^{2} -8x + 7

Step-by-step explanation:

(8x^{2} - 5x + 7) + (7x^{3}  - 3x) = 8x^{2} - 5x + 7 + 7x^{3}  - 3x = 7x^{3} + 8x^{2} - 5x  - 3x + 7 =  7x^{3} + 8x^{2} -8x + 7

xxMikexx [17]4 years ago
3 0

Answer:

7x³ + 8x² -8x + 7

Step-by-step explanation:

8x² - 5x +7 + 7x³ - 3x

7x³ + 8x² + (-5x -3x ) + 7

7x³ + 8x² -8x + 7

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7y-4y+2=<br> What’s the answer?
Kay [80]

Answer:

3y + 2 =

Step-by-step explanation:

7y - 4y = 3y

3y and 2 are not like terms, so you can't add any further

3 0
3 years ago
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What is the product? (9 t minus 4)(negative 9 t minus 4) negative 81 t squared minus 16 negative 81 t squared + 16 negative 81 t
liraira [26]

The product is negative 81 t squared + 16 ⇒ 2nd answer

Step-by-step explanation:

The product of two binomials (ax + b)(cx + d), where a, b, c, and d are constant

  • Multiply (ax) by (cx) ⇒ 1st × 1st
  • Multiply (ax) by (d) and (b) by (cx) ⇒ ext-reams and nears
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Let us find the product of (9 t - 4) and (-9 t - 4)

Multiply the 1st two terms

∵ (9 t)(-9 t) = -81 t²

Multiply the ext-reams

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Multiply the nears

∵ (-4)(-9 t) = 36 t

Add the like terms

∵ -36 t + 36 t = 0

Multiply the 2nd two terms

∵ (-4)(-4) = 16

Write the answer

∴ (9 t - 4)(-9 t - 4) = -81 t² + 0 + 16

∴ (9 t - 4)(-9 t - 4) = -81 t² + 16

The product is  -81 t² + 16

Learn more:

You can learn more about the product of algebraic expressions in brainly.com/question/1617787

#LearnwithBrainly

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Step-by-step explanation:

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