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If $A = 2 x^{2} + 3 x - 1$ and $B = x^{2} - x + 4$ , find $A + B$ .

Class 7Adding and Subtracting ExpressionsAlgebra

A $3 x^{2} + 2 x + 3$
B $3 x^{2} + 4 x + 3$
C $3 x^{2} + 2 x + 5$
D $x^{2} + 2 x + 3$

Step-by-Step Solution

x^{2} : 2 x^{2} + x^{2} = 3 x^{2}

;

x : 3 x - x = 2 x

; constants: -1 + 4 = 3.

A + B = 3 x^{2} + 2 x + 3

.

Answer: A)

3 x^{2} + 2 x + 3

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