Question

maths algebraic expression​

Answer 1

Answer:

7x^3+2x+x-1

Step-by-step explanation:

this is the correct answer

Answer 2

Answer:-

The required number is 7x³ + 5x² + x - 1

Step-by-step explanation:-

Question:-

$\sf{ \underline{Add \: \: the \: \: following:-}} \\ \\ \sf{ {4x}^{3} + {5x}^{2} + 2x - 6 \: \: and \: {3x}^{3} - x + 5 }$

Solution:-

$\sf {4x}^{3} + {5x}^{2} + 2x - 6 \\ \sf \: \: \: {3x}^{3} \: \: \: \: \: \: \: \: \: \: \: \: \: \: - x + 5 } \\ ( + ) \: \: ( + ) \: ( + ) \: ( - ) \\ \dots \dots \dots \dots \dots \\ \: \: \: \: \: \: \: \: \: \sf {7x}^{3} + {5x}^{2} + x - 1$

Remember:-

There are two methods to add like and unlike terms.

1. Horizontal method
2. Column method

Horizontal method :- All the expressions are written in a row and then the terms are arranged in a proper group to carry out the addition.

Column method :- ln this method the equation is written in a separate rows are that like the terms are arranged one below the other. Then, the addition of terms is carried out.