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Maths Puzzle
Numerical Ability
The formula A=2h(l+w) gives the lateral area A of a rectangle solid with length l, width w, and height h.
Q. Solve this formula for h.
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One more.
I am supposed to multiply and write as a polynomial in standard form: (2x+1)(x^3-x+2). I came up with 2x^4+1x^3-2x^2+3x+2. My question is how to put it into standard form?
what is -x-20=-5x+9?