Test for monday 11/30/20 Flashcards
1
Q
2^3 x 5^2 x 7
A
1400
= 2^3 × 5^2 × 7
= 2 × 2 × 2 × 5 × 5 × 7
= 1400
2
Q
3x^2 x 5x^5
A
15x^7
= 3x^2 × 5^5
= 3 x 5 × x^2 × x^5
= 15 × x^(2+5)^
= 15x^7
3
Q
250 000 in scientific notation
A
2.5 × 10^5
4
Q
a(b + c) = ?
A
ab + ac
5
Q
6(x + 9) = ?
A
6x + 54
6
Q
(a + b)(c + d) = ?
A
ac + ad + bc + bd
7
Q
(x + 8) (6 - n) = ?
A
6x - xn + 48 - 8n
8
Q
(a + b) (a - b) = ?
A
a^2 - b^2
9
Q
(x + 5) (x - 5) = ?
A
x^2 - 25
10
Q
(a + b)^2 = ?
A
a^2 + 2ab + b^2
11
Q
(a - b)^2 = ?
A
a^2 - 2ab + b^2
12
Q
a negative base raised to an odd power is ?
A
a negative (don't remember its the contrary for the other one)
13
Q
(a/b)^-2 = ?
A
(b/a)^2
14
Q
a^m × a^n = ?
A
a^m+n
15
Q
a^m / a^n = ?
A
a^m-n
