SAT Discussions - If A2 - B2 = 21 And A2 + B2 = 29, Which Of The Following Could Be The Value Of Ab?

If A2 - B2 = 21 And A2 + B2 = 29, Which Of The Following Could Be The Value Of Ab?

Madhumita 4 Years Ago

161

If a² - b² = 21 and a² + b² = 29, which of the following could be the value of ab?

I. -10

II. 5√2

III. 10

(A) I only

(B) II only

(D) I and III only

asked Jun 15 12:00:00 AM

Q: 339 A: 0