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x2 + 2x - 7 is a quadratic polynomial. Every polynomial defines a function called P. Any value of x for which P(x) = 0 is a root of the equation and a zero of the function.
x2 + 2x - 7 = 0 add 1 and 7 to both sides
x2 + 2x + 1 = 8
(x + 1)2 = 8 take the square root of both sides
x + 1 = ± √8 subtract 1 to both sides
x = -1 ± 2√2
Thus, the roots of the equation are -1 - 2√2 and -1 + 2√2.
What else can I help you with?
If 2x minus7 equals 9 then x equals?
8
What expression is equivalent to (4 and minus7)(2x and minus1)(4-7)(2x-1)?
It is 3 - 14x
What is the area bounded by the graphs of fx and gx where fx equals xcubed and gx equals 2x-xsquared?
What_is_the_area_bounded_by_the_graphs_of_fx_and_gx_where_fx_equals_xcubed_and_gx_equals_2x-xsquared
What is the situation for xsquared plus 2x plus 1?
Dire.
How do you factor xsquared plus 2x-3?
find factors of -3 (3 & -1 ) also add together to get 2 (for the 2x part) put x on both sides (x+3) (x-1) << because xsquared means x times x check it 3 times -1 = -3 3 times x = 3x -1 times x = -1x x times x = xsquared = xsquared + 2x -3 hope this helped =)
Y equals xsquared plus 2x-3?
-1
Multiply x plus 3 times x-5?
-2
How do you get 2x² from x?
You would multiply x by x which means xsquared, and then multiply that by two. Which is 2xsquared.
How do you factor xsquared-3x plus 2.25?
x2-3x+2.25 is the same as 4x2-12x+9 and is (2x-3)(2x-3) when factored
How do you solve 2x plus 5 -5?
2x + 5 - 5 = 2x. You can not solve for x because this is not an equation.
How do you solve 2x y 4?
Solve for y: f(-5)=13+2x
How do you solve solve for x 2x plus a equals p?
2x+a=p 2x=p-a x=.5p-.5a
