Answer:
Step-by-step explanation:
4x-40=7(-2x+2) multiply inside the parenthesis with 7
4x - 40 = -14x + 14 export like terms to the same side of equation
4x + 14x = 14 + 40 add like terms
18x = 54 divide both side by 18
x = 3
Answer:y=7
Step-by-step explanation:x=2+7=8
This is a quadratic equation with a general equation of ax^2 + bx + c.
The quadratic formula can help to get the roots of the equation. We know the highest degree of that equation is 2; so there will be also two roots.
The quadratic formula is
x = [-b ± √(b^2 - 4ac)] / 2a
With a = 1, b = 7, c = 2,
x = {-7 ± √[(7)^2 - 4(1)(2)]} / 2(1) = (-7 ± √41) / 2
So the two roots are
x1 = (-7 + √41) / 2 = -0.2984
x2 = (-7 - √41) / 2 = 0.2984
This is also another way of factorizing the equation
(x + 0.2984)(x + 0.2984) = x^2 + 7x + 2
Answer:
A number plus 5 is greater then or equal to 10.
(fg)(x)=f(g(x))=4(g(x))²-5=4(x+3)²-5=4x²+24x+31
