Question

add the algebraic expressions x²+x-2 and 2x²-5x+7​

Answer 1

$\large \mathfrak{Solution : }$

• ${x}^{2} + x - 2 + 2 {x}^{2} - 5x + 7$

• ${x}^{2} + 2 {x}^{2} + x - 5x - 2 + 7$

• $3 {x}^{2} - 4x + 5$

Answer 2

Answer:

$3x^2-4x+5$

Step-by-step explanation:

$x^2+x-2+2x^2-5x+7$

Group like terms:

$x^2+2x^2+x-5x-2+7$

Add similar elements:

$x^2+2x^2$

$=3x^{2}$

Add similar elements:

$x-5x$

$=-4x$

$3x^2-4x-2+7$

Add the numbers:

$-2+7$

$=3x^2-4x+5$

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