Respuesta :

SenorMathWiz

Answer:

B) x² + 5x + 19

Step-by-step explanation:

(2x² + 7x + 10) - (x² + 2x - 9)

==> remove parenthesis and apply negative sign

2x² + 7x + 10 - x² - 2x + 9

==> combine like terms

x² + 5x + 19

the answer is B

Important Note:

Like terms are terms with the same variable and exponent. Eg. 5x³ and x³ are like terms because they both have a common variable x, and a power of 3.

semsee45

Answer:

B)  [tex]x^2+5x+19[/tex]

Step-by-step explanation:

[tex](2x^2+7x+10)-(x^2+2x-9)[/tex]

[tex]\textsf{Apply rule}\:(a)=a:[/tex]

[tex]=2x^2+7x+10-(x^2+2x-9)[/tex]

[tex]\textsf{Apply distributive law}\:-(a+b)=-a-b\:\textsf{ and }\:-(a-b)=-a+b:[/tex]

[tex]= 2x^2+7x+10-x^2-2x+9[/tex]

Group like terms:

[tex]= 2x^2-x^2+7x-2x+10+9[/tex]

Combine like terms:

[tex]= x^2+5x+19[/tex]

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