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How did you find the factors of x squared minus eighty-one?
x2-81=(x-9)(x+9) Factors: x-9, x+9
What are the 5 factors in 81?
Factors are just numbers 81 can be divided by. The whole number factors are 1, 3, 9, 27, and 81
What two factors equals 81?
The factors of...72= 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, and 7281= 1, 3, 9, 27, and 81The Greatest Common Factor= 9
What are 81's common factors?
The factors of 81 are 1, 3, 9, 27, 81. For them to be common, they need to be compared to another set of factors.
What are the factors and prime factors tree of 81?
1, 3, 9, 27, 81 81 27,3 9,3,3 3,3,3,3
How do you solve x2 81 equals 0?
x: x2 - 81 = 0
What are the solutions to the equation x2 equals 81?
x2 = 81 Square root both sides:- x = +/- 9
What is x squared equals 9 squared - 2x squared?
7
X2 plus 6x plus 9 equals 81?
x2 + 6x + 9 = 81 x2 + 6x = 72 x2 + 6x - 72 = 0 (x+12)(x-6) = 0 x= -12, 6 (two solutions)
How do you solve x2-81 equals 0?
2x - 81 = 0 Add 81 to both sides. 2x - 81 + 81 = 0 + 81 Substitute, -81 + 81 cancels out. 2x = 81 Divide by 2. x = 40.5 Above answer would be correct if your question was 2x but it was x2 so using the same method you would get x2 = 81 here the opposite of the square is the square root x = 9
What is the answer to 81x2 equals 49?
x2 = 49/81 so x = 7/9
What number must you add t complete the square x2 plus 18x equals -13?
81. To complete the square, halve the coefficient of the x term (18/2 = 9) and add the square of this (92 = 81) to both sides: x2 + 18x = -13 ⇒ x2 + 18x + 81 = -13 + 81 ⇒ (x + 9)2 = 68
What are the factors for x2?
X squared equals x times x.
What are the factors of x2 equals -11x-10?
x2 = -11x - 10 x2 + 11x + 10 = 0 (x + 1)(x + 10) = 0
How do you solve x squared equals negative 81?
x2=-81take the square root of both sidessince 81 is negative you need to take 81 times i when i=-1 then solve as the square root of 81. your answer is x=9i
When completely factored x2 3x 2 equals?
do you mean x2 + 3x + 2 ? Factors are (x +2)(x+1)
What the answer for This x2-18 plus 81?
x2 + 63
