Question

va rooooog :) dau coroana


























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Answer 1

b)

20a-(-3x+5)+(12a-7x)-(22-15a)+28=20a+3x-5+12a-7x-22+15a+28=47a-4x+1

d)

(13x+5y√2+√11)-7x-(y√8+√44)=13x+5y√2+√11-7x-2y√2-2√11=6x+3y√2-√11

f)

13x²+(5-2,6x-2x²/5)+(1-7,4x+17x²/5)=13x²+5-2,6x-0,4x²+1-7,4x+3,4x²=16x²-10x+6