Linear Algebra

Question 1

When do you use substitution method?

Answer 1

use it when you can easily substitute a variable in an equation that don’t result in fractions

Question 2

When the product of two integers is 1?

Answer 2

either both are 1 or -1

Question 3

what the zero product property?

Answer 3

if the product of two quantities is equal to zero, then at least one quantity = zero

Question 4

a^2 - b^2

Answer 4

(a+b)(a-b)

Question 5

x^2-kx-16 = 0, how do you find k?

Answer 5

if we know at least one factor for the eq, then we can find k

Question 6

equation trap: when there is a quadratic eq present, what you should not assume?

Answer 6

do not assume a quadratic eq will always contain two unique values or one unique value

Question 7

equation trap: can you assume the value of a variable cannot be zero if its not specified explicitly?

Answer 7

NO

Question 8

equation trap: is one equation sufficient to find unique values for two variables?

Answer 8

YES

Question 9

equation trap: is one equation sufficient to find unique values for two variables?

Answer 9

YES

Question 10

equation trap: when you are asked to find the value of an expression like x+y, what you should not assume?

Answer 10

you do not have to know individual values within the expression to calculate the expression value

Question 11

equation trap: can an equation have three or more solutions?

Answer 11

YES