Explain the process of parametrisation and also write 3 application ?

Partially differentiate the following with respect to x1 and x2

Can use triangle substitution to integrate？

Please show the solution for this problem with 1 setence detailed explanation

Integrate using u subsitution

In exact form plz

ent/d/1aclVc5owmTUnYTxfQ40XLtNTfC97Tz96UgSvlS8pwk/ ADEMY_MATH 7_UNIT 6 WEEK 7 G Extensions Help Accessibility ext W Arial 2 Question 3 12 + BIU 1.12r+t-4r + 6t 2. (12r + 2) - (4r + 10f) 3.12(r+t) -6(r+t) − 4(r+f) − 2(r+f) 4 Match each expression in column A with an equivalent expression from column B. Show or explain your reasoning. Column A Column B • 8(r-t) 8(r+t) • Br+7t For each situation, write an expression for the new balance using as few terms as possible. Y

Show that Alf⋅g) = (Adig + 2D fo@g+ f(Ag)

Could someone help, i beleive the answer for a) should be y=cx^2+2 and for b) x= 3tan(3(c+t)) how tho?