Question

Simplify : (2-5x) (7x² -3)​

Answer 1

Answer:

You are in 8th std

from RIS school ...

.

• (2-5x) (7x² -3)

= 2(7x² - 3) - 5x(7x² - 3)

= 14x² - 6 - 35x³ - 15x

Answer 2

Answer:

hope it would be helpful for u

Step-by-step explanation:

Use the new quadratic formula in graphic form (Socratic Search)

y = 7x^2 + 5x + 8 = 0

D = d^2 = b^2 - 4ac = 25 - 224 = - 199 < 0

Because D < 0, there are no real roots.

Note. There are 2 complex roots.

d

=

±

i

√

199

x

=

−

b

2

a

±

d

2

a

=

−

5

14

±

i

√

199

14

=

−

5

±

i

√

199

14