magsters59501 magsters59501
  • 26-05-2021
  • Mathematics
contestada

Which expression is equivalent to (3x2-7) A) (2x2-11)-(x+4) B) (5x²-6)- (2x2-1) C) (10x² - 4)-(7x2+3 D) (15x2 +8)- (18x2+1)

Respuesta :

nuuk nuuk
  • 27-05-2021

Answer: (c)

Step-by-step explanation:

Given

The expression is [tex]3x^2-7[/tex]

checking options, for (a)

[tex]\Rightarrow 2x^2-11-x-4\\\Rightarrow 2x^2-x-15[/tex]

option (a) is incorrect

for (b)

[tex]\Rightarrow 5x^2-6-2x^2+1\\\Rightarrow 3x^2-5[/tex]

option(b) is incorrect

for (c)

[tex]\Rightarrow 10x^2-4-7x^2-3\\\Rightarrow 3x^2-7[/tex]

option (c) is matching with the given expression.

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