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Evaluate 2xy when x equals 30 and y equals 2?
2xy=2*30*2=120
When x-y equals 7 and xy equals 8 find the value of x square plus y square?
x2 + y2 = x2 - 2xy + y2 + 2xy = (x - y)2 + 2xy = 72 + 2*8 = 49 + 16 = 65 You could, instead, solve the two equations for x and y and substitute, but the above method is simpler.
Differentiate 2yx plus 4xy plus 2 equals 6?
2y + 2xy' + 4y + 4xy' = 0 6y + 6xy' = 0 y' = -y/x
4x2 - 4x plus 2xy - 2y?
4x2 - 4x + 2xy - 2y = 4x(x - 1) + 2y(x - 1) = (x - 1)(4x + 2y) = 2(x - 1)(2x + y)
What is the factor for 4x squared - 4x plus 2xy -2y?
2(x - 1)(2x + y)
2xy x equals 5 y equals 3?
2xy substitute 3 for y and 5 for x 2(5)(3) = 30
Evaluate 2xy when x equals 30 and y equals 2?
2xy=2*30*2=120
If 1 plus 1 equals 2 2 plus 2 equals 22?
no if 1 plus 1 equals 2 then 2 plus 2 equals 4.
When x-y equals 7 and xy equals 8 find the value of x square plus y square?
x2 + y2 = x2 - 2xy + y2 + 2xy = (x - y)2 + 2xy = 72 + 2*8 = 49 + 16 = 65 You could, instead, solve the two equations for x and y and substitute, but the above method is simpler.
Solve simultaneously y equals 2-x and x2 plus 2xy equals 3?
if y = 2- x then x^2 + 2x(2 - x) = 3 ie x^2 + 4 x -2x^2 = 3 ie 4x - 3 = x^2 x^2 - 4x +3 = 0 = (x - 1)(x - 3) so x = 1 or 3 Check: y= 2 - 1 =1; x^2 = 1, 2xy = 2 x 1 x 1 = 2, 1 +2 = 3. y = 2 - 3 = -1; x^2 = 9, 2xy = 2 x 3 x -1 = -6, 9 + -6 = 3. QED.
Differentiate 2yx plus 4xy plus 2 equals 6?
2y + 2xy' + 4y + 4xy' = 0 6y + 6xy' = 0 y' = -y/x
4x2 - 4x plus 2xy - 2y?
4x2 - 4x + 2xy - 2y = 4x(x - 1) + 2y(x - 1) = (x - 1)(4x + 2y) = 2(x - 1)(2x + y)
What are the factors of 2xy-4x plus 8y-16?
(2xy-4x)+ (8y-16)=2xy-4x+8y-16, which factors as 2(x+4)(y-2)
What is the factor for 4x squared - 4x plus 2xy -2y?
2(x - 1)(2x + y)
Factor 2xy - 4x plus 8y - 16?
( 2xy - 4x ) + ( 8y - 16)2 ( xy - 2x ) + 2 ( 4y - 8 ) Answer
Which addition sentence is a double minus one fact - 1 plus 1 equals 2 1 plus 2 equals 3 2 plus 3 equals 5 OR 5 plus 4 equals 9?
1 plus 1 equals one fact
What is x squared plus 2xy plus y squared?
(x+y)2
