Answer:
-1/4
Step-by-step explanation:
A reciprocal is simply defined as the inverse of a value or a number. So if we have a fraction of - 4/1 we can just flip the numerator and the denominator to get -1/4.
Well, the first step would be to multiply everything out. 1*2=2, g1*i=i, g2i*2=4i, and 2i*i=2i^2. This would bring the equation to 2+i+4i+2i^2=5(2+i)
Next, multiply the other side. 5*2=10, and 5*i=5i. The equation is now:
2+i+4i+2i^2=10+5i
Now, combine like terms, and arrange the sides from highest exponents to lowest exponents: i+4i=5i. You can arrange the equation to 2i^2+5i+2=5i+10.
Subtract 2 from both sides: 2i^2+5i=5i+8
Subtract 5i from both sides: 2i^2=8
Divide both sides by 2: i^2=4.
Finally, find the square root of 4 to get i. The square root of 4 is 2, so i=2.
Answer:
Step-by-step explanation:
3. x^2 +3x=54
x^2 +3x -54 = 0
(x-9)(x+6) = 0
x = 9 and x = -6
4. X^2 - 10x + 21 [(x - 7)(x - 3)
