Find all constants a such that the vectors (a, 2) and (a, -2) are orthogonal
please help​

b. x- 48 =120

step-by-step explanation:

answer: 1, 3 and 5 are correct

step-by-step explanation:

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

they disappear if your absent from to long. i found out that the hard way.

step-by-step explanation:

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