Question

(4√7-√119-4√3+√51)(4√7+√119+4√3+√51)=

Answer 1

(4√7-√119-4√3+√51)(4√7+√119+4√3+√51)=(4√7-√(7*17)-4√3+√(3*17))*

*(4√7+√(7*17)+4√3+√(3*17))=(√7 *(4-√17)-√3 *(4-√17))(√7 *(4+√17)+√3 *(4+√17))=

=(√7-√3)(4-√17)(√7+√3)(4+√17)=(7-3)(16-17)=-4