,What is the factored form of the expression?
10x^2 – 43xy – 66y^2

5. x^2 – 10xy + 24y^2

Question

,What is the factored form of the expression? 
10x^2 – 43xy – 66y^2 

5.   x^2 – 10xy + 24y^2

anonymous · Answer

I would factor by grouping. $$10x^2 – 43xy – 66y^2 $$ The coefficient of x^2 and y^2 is 10 and -66. The product of that is $$10*(-66)=-660$$ The factors of -660 which sum to -43 (comes form the coefficient of xy.) is -55 and 12. $$-55*12=-660$$ So you get: $$10x^2 – 43xy – 66y^2=10x^2-55xy+12xy-66y^2 $$ $$=2x(5x+6y)-11y(5x+6y)$$ Here you can factor common terms: $$(5x+6y)(2x-11y)$$

laila_2278 · Answer

14. Find the area of the shaded region. Use the formula A = The term is pi.r2 to find the area of a circle. https://www.connexus.com/content/media/666994-8212014-91604-PM-1020085866.jpg