#### • Class 11 Physics Demo

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#### • how to multiply radical expressions

Question:Does anybody know where I can find an online rational expressions calculator? Multiply, divide, addition, and subtraction.( Already tried mathway.com )

Answers:Try www.wolframalpha.com I entered (1/x + 1/y = ) and this online free program computed (x + y) / xy

Question:Can someone tell me how to multiply rational algebraic expressions. Then can u give me an example of a problem so I can understand it better. Thanks in advance!!!

Question:What are you supposed to do? and how do you do it to multiply this rational expression? Do you factor it first? and then cancel ? 18a -12a^2 ------------ 4a^2 + 4a + 1 multiplied by 4a^2 +8a +3 ---------------- 4a^2 -9

Answers:(18a -12a^2 ) ............. (4a^2 +8a +3 ) -------------------- ......x..... ------------------- (4a^2 + 4a + 1) ............ (4a^2 -9) factor as shown: -6a(2a-3) ...................... (2a + 1) (2a+3) ------------------ ... X........ ---------------------- (2a+1)(2a+1) ............... (2a +3)(2a-3) Simplify -6a ------- (2a +1)

Question:I have a lesson in Algebra II explaining how to multiply and divide rational expressions but it isn't as clear as I would like to be and I need help with some of my problems. Thank you, in advance! 4. (z^2-z-6)/(z-6) * (z^2-6z)/(z^2+2z-15) 5. (w^2-16)/(w) * (3)/(4-w) 8. (4x^2y)/(z^3) * (2xyz) 9. (2p^3q^2)/(8p^4q) / (4pq^2)/(16p^4) 11. (y62 + 2y)/(y^2+y-2) / (y+5)/(y^2+4y-5) **I need help on learning how to do these, not just answers. And, please don't waste your time telling me "to do my own homework".**

Answers:Sorry i only have 10 fingers :( jk jk