Sunday

March 29, 2015

March 29, 2015

Posted by **Help generation** on Saturday, September 26, 2009 at 3:39pm.

- math (Algebra) -
**Reiny**, Saturday, September 26, 2009 at 5:55pmthe usual way to write powers in this forum is x^2 for x

^{2}

so x^2 + 4x + 7

= x^2 + 4x + 4 - 4 + 7

= (x+2)^2 + 3

If I had the parabola y = (x+2)^2 + 3

its vertex would be above the x-axis at (-2,3) and it opens upwards.

So it cannot cross the x-axis.

Since roots are simply the x-intercepts of the corresponding function, we conclude that there are no real roots.

**Answer this Question**

**Related Questions**

maths - Consider the equation x(square) + 4px + 2q = 0 where p and q are real ...

Algebra - Express the following in simplest radical form. All variables ...

Algebra - Use the quadratic formula to solve the equation. Give exact answers: ...

Algebra - Rationalize each expression by building perfect nth root factors for ...

Algebra - 3(square root of)18 + square root of 2. How would I solve this problem...

College Algebra - I need some help with a handful of questions. I need to see ...

College Algebra - I need some help with a handful of questions. I need to see ...

College Algebra help please - I need some help with a handful of questions. I ...

Math simplifying mixed radicals - Please help me simplify these following mixed ...

Math PLEASE HELP ASAP - -PLEASE INCLUDE SOLUTIONS AND EXPLAIN HOW YOU DID IT ...