Answer:
Step-by-step explanation:
Foil the equation!
1. You see that is to the second power so it means this
2. Then you use the Foil method. First, Outside, Inside, and Last.
3. Combined like terms
4. Answer!
A tip you can use to avoid Foil is this mental math trick: (Keep in mind this only works if the polynomial is being squared.)
1. Multiply the first number by itself =
2. Add the first number by itself =
3. Multiply the last number by itself =
4. Combined to form your answer =
NOTE: This is the same thing as a foil but it uses mental math so it takes less time!
It is 293 in total it is like 220 plus 73 and it is 293
Let <em>S</em> denote the sum
We can condense this to sigma notation:
Expand the summand:
Recall the Faulhaber formulas,
So we have
Answer:
x=5 twice
Step-by-step explanation:
x^2-10x+25=0
multiply the coefficient of x^2 and the last term
1X25=25
find two numbers you can multiply to get 25 and add to get -10
-5 + (-5)=-10 the middle term
replace -10x with -5x -5x and solve the equation
x^2-5x-5x+25=0
factorise by grouping
x(x-5)-5(x-5)=0
(x-5)(x-5)=0
Either x-5=0,x=5 or x-5=0,x=5
Therefore x=5 twice.
Answer:
GH = 2√10
Step-by-step explanation:
Use the distance formula
d= √(x2-x1)²+(y2-y1)², where (x1= 0, y1=3) and (x2= -2, y2= -3)
d= √(-2-0)²+(-3-3)²
d= √4 +36
d= √40
d= 2√10