Posted by gen on Thursday, November 11, 2010 at 8:01pm.
if y1=x^2+3x-1 and y2=x-5,
find: a. y1+y2
- calculus - jai, Thursday, November 11, 2010 at 8:38pm
y1 = x^2 + 3x - 1
y2 = x - 5
for y1 - y2, combine similar terms,, for terms with same variables, add their numerical coefficients (number before the variable) and copy the variable:
x^2 + 3x - 1 -(x - 5)
x^2 + 3x - 1 - x + 5
x^2 + 3x - x - 1 + 5 *i just rearrange the terms*
x^2 + 2x + 4
for y1(y2), distribute each term:
(x^2 + 3x - 1)(x - 5)
to distribute, multiply x^2 by x plus x^2 times -5, plus 3x times x plus 3x times -5, and so on:
(x^2)*x + (-5)x^2 + 3x^2 - 15x - x + 5
now simplify this by combining similar terms.
- calculus - Anon, Thursday, November 11, 2010 at 8:41pm
Alright. a. y1+y2 should be set up as follows:
(x^2+3x-1)+(x-5), which equates to
You just combine the like terms.
For this one you need to distribute the negative, to get x^2+3x-1-x+5, then combine like terms.
c. (x-5)(x^2+3x-1)= x^3+3x^2-x-5x^2-15x+5. Combine like terms.
Answer this Question
- Pre-Calculus/Calculus - I am too embarassed to ask this Calculus (really pre-...
- Math:Calculus - Use the Fundamental Theorem of Calculus to find the derivative ...
- Calculus Help - Use calculus to find the area A of the triangle with the given ...
- math, calculus 2 - Use part 1 of the Fundamental Theorem of Calculus to find ...
- Calculus - The area is bounded by y= x^3, x= 2 is rotated around the x-axis. ...
- Calculus - A curve is defined by the parametric equations: x = t2 – t and y = t3...
- COLLEGE CALCULUS. HELP! - the fundamental theorem of calculus, f(x)=∫(0,x...
- calculus - Find the arc length of the graph of y = x from x = 0 to x = 3 using ...
- Calculus AP need help! - Use Part 1 of the Fundamental Theorem of Calculus to ...
- Calculus 1 - Use the fundamental theorem of calculus to find the area bounded by...