1. The square of 5 more than a number.
2. A square has sides of length 3x-2cm. Express the area of the square as a polynomial.
2007-11-16 08:01:38 · 7 answers · asked by lele 2 in Science & Mathematics ➔ Mathematics
x + 5^2
A = (3x-2)^2 = 9x^2 -12x +4 cm^2
2007-11-16 08:05:23 · answer #1 · answered by ironduke8159 7 · 0⤊ 0⤋
1.The square of 5 more than a number.
(x+5)^2 = x^2 + 10x + 25
where x = is a number
2. A square has sides of length 3x-2cm. Express the area of the square as a polynomial.
solution:
A = side * side
since in terms of polynomials, we do this
A = (3x-2) * (3x-2)
simplify, using the FOIL method
A = 9x^2 -6x -6x + 4
simpliy it again,
A = 9x^2 -12x + 4 is the answer.
2007-11-16 16:08:07 · answer #2 · answered by Anonymous · 0⤊ 0⤋
1. (a) +(5)^2 = a +25
2. Area = (3x -2)^2 = 9x^2 -12x +4
2007-11-16 16:05:12 · answer #3 · answered by Any day 6 · 0⤊ 0⤋
add a number (n) to 5 5+n now square it (5+n)^2
^ means raised to a power
since a square has equal sides, use technique from my last answer and just square it (3x-2)^2
The idea in algebra is simply to change the words into letters
2007-11-16 16:08:55 · answer #4 · answered by ? 3 · 0⤊ 0⤋
1. (x+5)^2 = x^2 + 10x + 25
2. (3x - 2)^2 = 9x^2 - 12x + 4
2007-11-16 16:04:19 · answer #5 · answered by chcandles 4 · 0⤊ 0⤋
not sure about ya first 1 but i can guess at:
(n+5)^2
2. (3x-2)^2 = (3x-2)(3x-2) = 9x^2 - 6x - 6x + 4 = 9x^2 - 12x + 4
2007-11-16 16:07:13 · answer #6 · answered by Anonymous · 0⤊ 0⤋
2.(3x-2)(3x-2)sq. cm
=9x^2-12x+4 sq. cm.
2007-11-16 16:05:55 · answer #7 · answered by alvin 1 · 0⤊ 0⤋