Use the distributed property
or foil method and the result will be x^2+4x+4
Now quadratic equation is an equation with a higher degree than linear equation. Quadratic equation has a degree of 2. You can get the value of x through completing square extracting square root and quadratic formula
Ex. Just replace the values of a, b and c.
YES, A SOLUTION IS JUST WHERE THE QUADRATIC CROSSES OVER THE X AXIS. Discriminant of a quadratic equation provides you with the indication of the number of solutions. For the equation ax2+bx+c=0, D=b2-4ac is the discriminant. 1) D>0; there are two distinct solutions.
YOUR QUADRATIC IS IN THE FORM OF AX^2 +BX+C
USE THE DISCRIMINANT TO FIND OUT THE NATURE OF THE ROOTS, NOW THE NATURE OF THE ROOTS WILL TELL YOU IF THE ANSWER IS RATIONAL, IRRATIONAL, IMAGINARY, OR IF THERE IS ONE OR TWO ANSWER.
SINCE YOU ARE ONLY WORRIED ABOUT THE NUMBER OF SOLUTIONS THEN THAT'S ALL WE'LL FOCUS ON.
THE DISCRIMINANT IS B^2 -4AC
IF YOUR ANSWER IS NEGATIVE, THEN THERE IS NO SOLUTION
IF YOUR ANSWER IS ZERO, THEN THERE'S ONE SOLUTION
IF YOUR ANSWER IS POSITIVE, THEN THERE'S TWO SOLUTIONS
REGARDING How do you find a quadratic equation if you are only given the solution?
YOU NEED SUM OF THE ROOTS AND PRODUCT OF THE ROOTS
SUM OF THE ROOTS = -B/A
PRODUCT OF THE ROOTS = C/A
SO LETS SAY YOU HAVE A QUADRATIC W SOLUTIONS (SAME THING AS ROOTS) X=5 AND X= 7
SUM OF THE ROOTS WOULD BE 12 (JUST ADD THE ANSWERS
PRODUCT OF THE ROOTS WOULD BE 35 (MULTIPLY THE ANSWERS)
SO SUM OF THE ROOTS IS -B/A, BUT WE KNOW ITS 12.. WE CAN SAY -B/A = 12/1. I PUT THE 12 OVER 1 BC ITS A WHOLE NUMBER AND I JUST LIKE TO COMPARE FRACTIONS TO OTHER FRACTIONS, ITS A LITTLE EASIER.
THE PRODUCT OF THE ROOTS IS C/A OR 35, SO C/A = 35/1.
C/A = 35/1 -B/A = 12/1
WE CAN THEN SAY THAT A = 1, B = -12 (WATCH YOUR SIGNS) AND C = 35
THE QUADRATIC THAT GOES W THIS WOULD BE
Is it possible to have different quadratic equations with the same solution?
YES, A SOLUTION IS JUST WHERE THE QUADRATIC CROSSES OVER THE X AXIS.
SO EASY EXAMPLE WOULD BE Y=X^2 AND Y=5X^2. THEY ARE DIFFERENT QUADRATICS AND THEY BOTH HAVE ONLY ONE SOLUTION, ZERO