Answer:
-33.
Step-by-step explanation:
[12 -5 x 9]
= 12 - 45
= -33.
Answer:
36a^6
Step-by-step explanation:
46a^6 - 10a^6 =
36a^6
Answer: 4x
Step-by-step explanation: Move all terms that don't contain y to the right side and solve. y = 4x
One way to solve the system is to <u>substitute</u> a variable.
<u>Explanation:</u>
One approach to solve an equation is by substitution of one variable. Right now, a condition for one factor, at that point substitute that arrangement in the other condition, and explain. All value(s) of the variable(s) that fulfills a condition, disparity, arrangement of conditions, or arrangement of imbalances.
The technique for tackling "by substitution" works by settling one of the conditions (you pick which one) for one of the factors (you pick which one), and afterward stopping this go into the other condition, "subbing" for the picked variable and fathoming for the other. At that point you back-explain for the principal variable.
You notice that all expressions are quadratic ones.
To be able to simplify, you must find the root (or the zeros) of each expression in applying the following formula :
x' = [-b + √(b²-4ac)]/2a and x" = [-b - √(b²-4ac)]/2a
Once you find the roots you will re-write EACH expression under the form:
(x-x')(x-x"). After computing you'll find:
for w²-8w-9 , w' = 9 and w" = -1 → (w-w')(w-w") →(w-9)(w+1) (#1)
for w²-1 you can expand it as→→→→→→→→→(w-1)(w+1) (#2)
for w²+10w+9, w' = -9 and w" = -1 → (w-w')(w-w") →(w+9)(w+1) (#3)
for w²-10w+9, w' = 9 and w" = 1 → (w-w')(w-w") →(w-9)(w-1) (#4)
Now we (#1)/(#2) : (#3)/(#4), which you can re-write (#1)/(#2) x (#4)/(#3)
Replace (#1)/(#2) x (#4)/(#3), by their respective values:
[(w-9)(w+1)/(w-1)(w+1)] x [(w-9)(w-1)/(w+9)(w+1)]
After simplification you will get : (w-9)/(w+1) (first answer)