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The second semester of the first year of junior high school I'd like to ask, in the first chapter of the second semester of junior high school, where is this mathematics book published? Is there an e-book? The second chapter is: parallel lines and intersecting lines
People's education press. There are e-books, on the people's education press website
The operation of integral
First simplify, then evaluate x (x + 2Y) - (2x) & sup2; + 2x, where x = 1 / 25, y = - 25
x(x+2y)-(2x)²+2x
=x²+2xy-4x²+2x
=-3x²+2x+2xy
=-3*1/625+2/25+2*1/25*(-25)
=-1203/625
The integral operation of junior one is divided into three parts
If 3 ^ 2m * 9 ^ m + 1 * 27 ^ m + 1, find the value of M
Given 2 ^ x = a, 2Y = B, find 8 ^ x + y
The first question has no equal sign, how to ask
Question 2: 8 ^ x = (2 ^ 3) x = 2 ^ 3x = (2 ^ x) ^ 3 = a ^ 3
y=b/2
8^x+y =a^3+b/2
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