Answer:
x=3 and x=-1.25
Step-by-step explanation:
4x^2-7x=15
subtract 15 from each side:
4x^2-7x-15=0
factor (trying different numbers that the sum is 7 and the quotient is 15)
(2x-6 )(2x+2.5 )=0
2x-6=0 add 6 to each side
2x=6
x=3
2x+2.5=0 subtract 2.5 from each side
2x=-2.5
x=-1.25
(f · g)(x) = f(x) · g(x)
f(x) = 3x + 2; g(x) = x^2 + 1
(f · g)(x) = (3x + 2)(x^2 + 1) = 3x^3 + 3x + 2x^2 + 2 = 3x^3 + 2x^2 + 3x + 2
Answer:
Other side, the opposite function, on both sides of the equation, in the numerator, not the denominator
Step-by-step explanation:
To isolate a single variable when rearranging equations, move all other variables to the other side of the equation by using the opposite function on them and remembering to perform that operation on both sides of the equation. Make sure the rearrangement has the target variable in the numerator, not the denominator.
Answer:
1.9x+3.7
Explanation:
3.6x + (-1.7x)= 1.9x
5.9 - 2.2= 3.7
