For this go on to the website discovery education. Then go under students and click math. And then where it says step by step math in green, click on trigonmetry and calculus. I forgot what area of math this is but choose from one of the items. And jot it in the box search thing and when you press enter it gives you the answer with a wonderful explanation on how to get there. I've used it for math a couple of times.
x^2+4x = 21
take half the middle term coefficient, square it, then add it to both sides
x^2 + 4x + 4 = 21 + 4
(x+2)^2 = 25
x+2 = ± √25 = ± 5
x = -2 ± 5
x = 3 or -7
math/trigonometry - solve this equation by completing the square. x^2+4x-21=0
math,correction - Is this correct now. Problem #1 solve by completing the square...
Algebra 2 - Solve by completing the square. aČ - 2√(3a) + 2 = 0 Solve for ...
Math - Hi everyone. Would someone be able to help me with this problems? I know ...
math - 4x^2+4x=3 solve by completing the square
Math - Solve by completing the square, 8x^2+4x-4=0
math,help,algebra I - I need help can someone help me get unstuck and let me ...
Math - Solve the equaton by completing the square. 4x^2-8x-3=0
maths - solve the following equation by completing the square x(square) -13x + ...
Math - I need help with how to do these problems.. SOLVE THE EQUATION USING THE ...