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Mathematics, 29.03.2021 18:00 AshBorg
EDG-ENUITY MATH 9TH GRADE MARCH 29: ANSWERS IF YALL NEED HELP WITH ANYTHING HIT THE HEART ON MY PROFILE TO NOTIFIE ME THEN TELL ME WHAT U NEED. THIS MEANS CORRECT <<<<< the arrows
What are the values of the coefficients and constant term of 0 = 4 – 7x2 + x in standard form?
a = -7
b = 1
c = 4
Which equations have a leading coefficient of 3 and a constant term of –2? Check all that apply.
0 = 3x2 + 2x – 2<<<<<<
0 = –2 – 3x2 + 3
0 = –3x + 3x2 – 2<<<<<<
0 = 3x2 + x + 2
0 = –1x – 2 + 3x2<<<<<<
Two of the steps in the derivation of the quadratic formula are shown below.
Step 6: StartFraction b squared minus 4 a c Over 4 a squared EndFraction = (x + StartFraction b Over 2 a EndFraction) squared
Step 7: StartFraction plus or minus StartRoot b squared minus 4 a c EndRoot Over 1 a EndFraction = x + StartFraction b Over 2 a EndFraction
Which operation is performed in the derivation of the quadratic formula moving from Step 6 to Step 7?
subtracting StartFraction b Over 2 a EndFraction from both sides of the equation
squaring both sides of the equation
taking the square root of both sides of the equation<<<<<
taking the square root of the discriminant
The discriminant of a quadratic equation is the value b2 – 4ac. What is the value of the discriminant of 0 = –2x2 + 6x + 13?
140<<<<
Consider the function f(x) = 3x2 + 7x + 2.
What is the value of the discriminant?
✔ 25
How many x-intercepts does this function have?
✔ 2
What are the number of zeros for this function?
two real numbers<
Which graph shows a quadratic function with a discriminant value of 0?
its D<<<
Which values of c will cause the quadratic equation –x2 + 3x + c = 0 to have no real number solutions? Check all that apply.
-5 and -9/2
Which value of b will cause the quadratic equation x2 + bx + 5 = 0 to have two real number solutions?
–5<<<<<
–3
3
4
Describe how to derive the quadratic formula from a quadratic equation in standard form
The quadratic formula is derived from a quadratic equation in standard form when solving for x by completing the square. The steps involve creating a perfect square trinomial, isolating the trinomial, and taking the square root of both sides. The variable is then isolated to give the solutions to the equation.
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EDG-ENUITY MATH 9TH GRADE MARCH 29: ANSWERS IF YALL NEED HELP WITH ANYTHING HIT THE HEART ON MY PROF...
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