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Which graph represents the solution set for the quadratic inequality x2 + 2x + 1 > 0?

Which graph represents the solution set for the quadratic inequality x2 2x 1 gt 0 class=

Respuesta :

Answer:

We have to determine the graph of the given inequality as:

[tex]x^2+2x+1>0[/tex]

on solving this equation we get:

[tex](x+1)^2>0[/tex]

Since we know that:

[tex](x+1)^2=x^2+1^2+2\times x\times 1\\\\(x+1)^2=x^2+1+2x[/tex]

Now we know that when [tex]x=-1[/tex] the value of:

[tex](x+1)^2=0[/tex]

Also for the value other than -1 the function being a quadratic function will always give a non-zero positive value.

Hence, range of the function in intervals could be written as:

(-∞,-1)∪(-1,∞).

Hence, the graph of the function will be the whole of the number line with a open circle on -1.

Ver imagen virtuematane

Answer: C

Step-by-step explanation: