Thursday

March 5, 2015

March 5, 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: ...

Pure Mathematics - 1) i) use an algrbraic method to find the square root of 2+i...

Math - 3 times the square root of 3. Would I be right in saying that just ...

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 ...

Advanced Algebra - I some problems that I need help with please. Add or subtact ...

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