Answer:
Refer below for detailed explanation.
Step-by-step explanation:
Standard equation:
1. ax^2+bx+c=0.
Quadratic formula:
2. x = -b+-sqrt(b^2-4ac)/2a. .
Now two equations to find the factored form through these formulas above.
Through this identifying a,b and c.
ax^2+bx+c=0.
x^2+4x-21=0
Here a=1, b=4, and c= -21
Now applying in the quadratic formula.
x=-4+-sqrt(4^2-4(1)(-21))/2(1)
Now solve it and it becomes
x=3 or x= -7.
Another example :
x^2+3x-4=0
Here a=1, b=3 and c=-4.
X=-3+-sqrt(3^2-4(1)(-4))/2(1)
Now solve it and
x= -4 and x=1
P.s have attached the picture of quadratic formula as well.
Easily you can try each formula with x=-2
because we know f(-2)=-1
So ,in this way D is correct Only!!
Answer:
1-) 8x+10
2-) -5x-5
3-) 2x-20
Step-by-step explanation:
Type your response in the box. Simplify these algebraic expressions:
1-) 12x + 3 − 4x + 7
2-) 8 − 7x − 13 + 2x
3-) −3x − 18 + 5x − 2
HOPE THIS HELPS<3
Step-by-step explanation:
<h2>hope my answer helps you mark me brainliest hope your day goes well </h2>
Answer B (-3,-5)
As y=6x+13
so
6x+13=2x+1
4x=-12
x=-3
so
y=6(-3)+13
y=-5