Question

Номер 307 (1,3) номер 306(1)хелп!!!

Answer 1

307 (1,3)

(х²+8х) - (4-3х)=х² - 4 + 8х+3х=x²+11x - 4=(х-2)(х+2)+11х

(9m²-5m+4) - (-10m+m²+5)=9m²-m²-5m+10m+4-5=8m²+5m - 1

306(1)

(-5х² - 4)+(8х²-6)= -5х²+8х² - 4 - 6=3х² - 10