Question

exercitile 3 si 6 rpd​

Answer 1

Răspuns:
3.√(√8-4)²+√(√18-6)²+5√(1-√8)²+√(√50-8)²
=(√√8²-2x√8x4+4²)+(√√18²-2x√18x6+6²)+(5√1²-2x1x√8+√8²)+(√√50²-2x√50x8+8²)
=(√8-8√8+16)+(√18-12√18+36)+(5√1-2√8+8)
=√7√8+16+√11√18+36+5√-2√8+9
=√7√8-10√8+11√8+52+45
=√-3√8+11√8+97
=√8√8+97
=√512+97
=√609

Ne amintim:
(a + b)( a – b) = a² – b²
(a + b)² = a² + 2ab + b2
(a – b)² = a² – 2ab + b2

Sper ca te-am ajutat!