The expression 15x + 10 is equivalent to ____. 5(3x + 5) 3(5x + 10) 5(3x + 2)
2 answers:
Answer:
The expression 15x + 10 is equivalent to 5(3x+2)
Step-by-step explanation:
Hello, I think I can help you with this
factorize a polynomial is to break it down into two or more polynomials called factors, so that, by multiplying them, you get the original polynomial
step one
The expression 15x + 10 must be factorized, the common term between 15 and 10 is 5,
so , the answer is 5(3x+2)
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The answers are 3.19 or -2.19.
In order to complete the square, you must first get the constant to the other side of the equation. WE do that by adding 7 to both sides.
x^2 - x - 7 = 0
x^2 - x = 7
Now we must take half of the x coefficient (-1), which would be -.5. Then we square it and add it to both sides. This is the second step to any completing the square problem.
x^2 - x = 7
x^2 - x + .25 = 7.25
Now that we have done that, the left side will be a perfect square so that, we can factor it.
x^2 - x + .25 = 7.25
(x - .5)^2 = 7.25
After having done that, we can take the square root of both sides
(x - .5)^2 = 7.25
x - .5 = +/-
Now we can take the value of that square root and solve.
x - .5 = +/-
x - .5 = +/-2.69
x = .5 +/- 2.69
And with the + and - both there, we need to do both to get the two answers.
.5 + 2.69 = 3.19
.5 - 2.69 = -2.19