Once students learn the strategy for doing these kinds of questions, the SAT and other standardized tests seem rather easy!
x+y=10
x^2+y^2=10
Find x^3+y^3
Ans: -350
Notes:
(1) Before giving students this question you may wish to scaffold with finding xy first.
Ans: 45
(2) To promote connection-making and to deepen their thought processes, give them the answer -350 and ask:
(a) Without graphing. explain why the graphs of the 2 given eqns DO NOT INTERSECT!
(b) Then how can there be a solution!
Sent from my Verizon Wireless 4GLTE Phone
x+y=10
x^2+y^2=10
Find x^3+y^3
Ans: -350
Notes:
(1) Before giving students this question you may wish to scaffold with finding xy first.
Ans: 45
(2) To promote connection-making and to deepen their thought processes, give them the answer -350 and ask:
(a) Without graphing. explain why the graphs of the 2 given eqns DO NOT INTERSECT!
(b) Then how can there be a solution!
Sent from my Verizon Wireless 4GLTE Phone
Posts
No comments:
Post a Comment