Question

Simplify 30a² +7(a+3) -10a(2a + 1)

Answer 1

Step-by-step explanation:

= 30a²+7a+21-20a²-10a

= 30a²-20a²+7a-10a+21

= 10a²-3a+21

a = [-(b)+-√(b²-4ac)]/2a

= [-(-3)+-√(-3²-4×10×21)]/2×10

= [3+-√(9-840)]/20

= (3+-√-831)/20

further you can try by your self

hope it will help uhh

plzz mark as brainliest