Question

va rog e urgent !! dau coroană​

Answer 1

Răspuns:

13. a) (√3+√5x)²-(√15x-2)²=3+2√15x+5x²-15x²+4√15x-4=-10x²+6√15x-1

b) (3-√14x)²-(√7x+√2)²=9-6√14x+14x²-7x²-2√14x-2=7x²-8√14x-7

c) (2√2x-√3)²+(√2+2√3x)²=8x²-4√6x+3+2+4√6x+3x²=11x²+5

d) nu se vede complet

14. a) (x-5)(x+5)(x²+25)=(x²-25)(x²+25)=x⁴-625

b) (x-4)(x+4)(x²+16)=(x²-16)(x²+16)=x⁴-256

c) (2x-1)(2x+1)(4x²+1)=(4x²-1)(4x²+1)=16x⁴-1

d) (3x+2)(2-3x)(4+9x²)=(4-9x²)(4+9x²)=16-81x⁴

Explicație pas cu pas: