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When x = 2, the value of the square of 2x + 3x + n is 10. When x = - 2, the value of the algebraic formula is obtained
x=2
The square of + 3N + 2x
=8+6+n=10
n=-4
x=-2
The square of 2x + 3x + n
=8-6-4
=-2
(1) 6xy ^ 2 - {3x ^ y - [2XY ^ - (5xy ^ 2-4xy ^ 2)]}, where x = 3, y = - 1
(2) 3a^2b-3(ab^2+3/5a^2b)-a^2b
It's two
Given x + y = 10, then (X-2) square + (Y-2) square + 2XY =?
﹙x-2﹚²+﹙y-2﹚²+2xy
=x²-4x+4+y²-4y+4+2xy
=﹙x+y﹚²-4﹙x+y﹚+8
=10²-4×10+8
=68
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