Question

2(5x - 3) (7x + 3= 0 porfavor ayúdenme​

Answer 1

2(5x - 3) (7x + 3) = 0

(10x - 6)(7x + 3) = 0

70x² + 30x - 42x - 18 = 0

70x² - 12x - 18 = 0

(-b±√b²-4ac):(2a)

{12±√(-12)²-4(70)(-18)} : {2(70)}

{12±√144 + 5040} : (140)

(12±√5184) : (140)

(12±72) : (140)

• (12+72) : (140) = 3/5
• (12-72) : (140) = -3/7