Question

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question to MathsAryabhttas, and geniuss:-

Question 3.What is the sum of 5x3 – 3x2 - 1 and 3x2 + 1?



only answer needed!!


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Answer 1

Answer:

$\left(5x^3-3x^2-1\right)+\left(3x^2+1\right)=5x^3$

Step-by-step explanation:

$\left(5x^3-3x^2-1\right)+\left(3x^2+1\right)$

$\gray{\mathrm{Remove\:parentheses}:\quad \left(a\right)=a}$

$=5x^3-3x^2-1+3x^2+1$

$\gray{\mathrm{Group\:like\:terms}}$

$=5x^3-3x^2+3x^2-1+1$

$\gray{\mathrm{Add\:similar\:elements:}\:-3x^2+3x^2=0}$

$=5x^3-1+1$

$\gray{-1+1=0}$

$=5x^3$

Answer 2

Answer:-

$(5x {}^{3} - 3x {}^{2} - 1) + (3x {}^{2} + 1) \\ = 5x {}^{3} - 3x {}^{2} - 1 + 3x {}^{2} + 1 \\ = 5x {}^{3} - 3x {}^{2} + 3x {}^{2} - 1 + 1 \\ = - 3 {}^{2} + 3x {}^{2} = 0 \\ = 5x {}^{3} - 1 + 1 \\ = - 1 + 1 = 0 \\ = 5x {}^{3}$

Explanation:-

• First the line form the question 5x3 – 3x2 - 1 and 3x2 + 1.

• Then Remove the brackets ( )

• Then seperate the like terms.

• Finally add the line =( - 1 + 1) and =( - 1 + 1 = 0) =(5x³)

Also refer the attachment:-