8 - 9 + 7 =
6
What is a monomial?
Any number, variable, or combination of numbers and variables multiplied together.
eg. 26, x, ab, r2, 43b
15 × 13 + 25 × 6 =
195 + 150
= 345
What is a binomial?
Two monomials, separated by addition or subtraction
eg. x + 4, or 43b - y
Write as subtraction: -7+ (-10)=
What is -7+(-10)
(10*-2)/5
What is -4
23 – 3 × (8 – 6)
17
Simplify the following:
15x - 4x
15x - 4x = 11x
What is the difference between (-2)2 and -22 ?
When the negative is inside the bracket, you have to square the negative number.
Eg. (-2)(-2) = 4
When the negative is outside the bracket, you have to square the number first, then make the answer of that negative.
Eg. 2x2, and then make it negative, so -4.
12 - (6 + 2)3
12 - (8)3
= 12 - 512
= -500
Simplify the following:
12xy + 14y - 15yx + 2
-3xy + 14y + 2
12xy and -15yx can be combined because the order of the variables doesn't matter.
12 - (-300) + (-24)
12 - (-300) + (-24)
= 12 + 300 - 24
= 312 - 24
= 288
-|3+(-12)|=
What is -9
[45 / (-5)] / (-8+3)2
[45 / (-5)] / (-8+3)2
= (-9)/(-5)2
= (-9) / 25
= - 0.36
If x = 6 and b = 12, find the following:
10 + 12xb - 11bx + 2b - 7b
10 + 12xb - 11bx + 2b - 7b
= 10 + bx - 5b
= 10 + (12)(6) - 5(12)
= 10 + 72 - 60
= 22