taking square root
solve x2=36
x = +-6
solve p2-5p-14
(p+2)(p-7)
A bag contains 2 red, 3 green and 2 blue pens. Two pens are drawn at random. What is the probability that none of the pens drawn are blue?
10/21
Solve 4x2 − 12x − 4 = 12 by completing the square
x = -1 and x = 4
What does SAS stand for?
Side angle side theorem.
solve x2=16
x = +-4
solve x2-16x+63
(x-9)(x-7)
In a class, there are 15 boys and 10 girls. Three students are selected at random. The probability that 1 girl and 2 boys are picked is:
21/46
solve x2-6x+9=0 by completing the square
x = 3
What does SSS stand for?
Side side side.
solve x2-3=46
x = +-7
solve 2b2+17b+21
(2b+3)(b+7)
Two dice are tossed. The probability that the total score is a prime number is:
5/12
solve x2-5x-24=0 by completing the square
x = -3 and x = 8
What does AA stand for?
Angle angle similarity.
solve (x+1)2=4
x = -3 and 1
solve 28n4+16n3-80n2
4n2(7n-10)(n+2)
A card is drawn from a pack of 52 cards. The probability of getting a queen of club or a king of heart is:
1/26
solve 9x2-12x+13=0 by completing the square
x=2/3+i and x=2/3-1
What is the ratio for the cosine of an acute angle?
cosθ=adjacent/hypotenuse
solve (x+6)2-13=-4
x = -9 and -3
solve 9r2-5r-10
not factorable
Three unbiased coins are tossed. What is the probability of getting at most two heads?
7/8
solve 4x2-8x+1=0 by completing the square
x=1+√3/2 and x=1-√3/2
What is the ratio for the sine of an acute angle?
sinθ=opposite/hypotenuse