Question

1.     Add the following   a)    10x2, -5x2 ,  8x2 and  -12x2​

Answer 1

Answer:

10×2=20,-5×2=-10,8×2=16,-12×2=-24

20+(-10)+16+(-24)

20-10+16-24

20+16-10-24

36-34=2Ans

Answer 2

Answer:

Addition of $10x^{2} , -5x^{2} ,8x^{2}$ and $-12x^{2}$ is $x^{2}$.

Step-by-step explanation:

Given : The terms are $10x^{2} , -5x^{2} ,8x^{2}$ and $-12x^{2}$.

To find : The addition of the above terms.

Solution :

• The given terms are $10x^{2} , -5x^{2} ,8x^{2}$ and $-12x^{2}$.
• We have to find the addition of the above terms.
• Addition is one of the important arithmetic operation among division, multiplication, addition and subtraction of mathematics.
• We can find the total of the given quantities with the help of addition.
• So, the required equation becomes,

      $10x^{2} +(-5x^{2} )+8x^{2} +(-12x^{2} )$

    = $10x^{2} -5x^{2} +8x^{2} -12x^{2}$     [∵ +ve -*(-ve)=-ve]

    = $18x^{2} -17x^{2}$

    = $x^{2}$

• ∴ Addition of $10x^{2} , -5x^{2} ,8x^{2}$ and $-12x^{2}$ is $x^{2}$.