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If A-B = 3, ab = - 1, then the value of the algebraic expression 3ab-a + B-2 is___ ．
∵ A-B = 3, ab = - 1, ∵ 3ab-a + B-2, = 3 × (- 1) - 3-2, = - 3-3-2, = - 8
Real numbers x, y satisfy x ^ + y ^ 2 = 4, find the maximum value of x ^ 2 + 6y + 2
x^2+6y+2
=4-y^2+6y+2
=-(y-3)^2+15
Note that - 2 ≤ y ≤ 2
In this interval, the function increases monotonically
So the maximum value is f (2) = 14
The highest degree of the polynomial XY & sup2; - 9xy + 5x & sup3; Y & sup2; - 25 is
The highest order is 5x & # 179; Y & # 178;
What are the quadratic coefficients of the polynomial XY & sup2; - 9xy + 5x & sup2; y-25
Do you want to send it
The terms XY & sup2;, 5x & sup2; y are all cubic terms. In a monomial, the number of times is the sum of the exponents of the unknown letters
-25 is a constant term
-9xy is a quadratic term and its coefficient is - 9
RELATED INFORMATIONS
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