Question

-x^2 - x + 30=0

alguém pode mim ajudar ​pfvr

Answer 1

x=2a−b−+​b2−4ac​​x=2∗(−1)−(−13)−+​−132−4∗(−1)∗(−40)​​x=−213−+​169−160​​x=−213−+​9​​x=−213−+​3​x′=−213+3​=−216​=−8x′′=−213−3​=−210​=−5​