Question

Daca a×b= -32V6 , a = -4V3 si c = -9V2 atuncia(b+c) este egal cu ...


V= inseamna radical
dau coroana orcine va rog mult ​

Answer 1

Răspuns:

a × b = -32√6

a = -4√3

c = -9√2

b = ? | (b × c) = ?

— — — — — — — — —

b = (a × b) ÷ a

b = -32√6 ÷ -4√3

b = (-32) ÷ (-4)√(6 ÷ 3)

b = +8√2 => b = 8√2

— — — — — — — — —

b = 8√2

c = -9√2

(b × c) = ?

— — — — — — — — — –

(b × c) = 8√2 × (-9√2)

(b × c) = [8 × (-9)]√(2 × 2)

(b × c) = -72√4