3 years ago

Factorise1) 9a^2 - 6a

Mathematics

1 answer:

lyudmila [28]3 years ago

3 0

Answer:

$3a(3a - 2)$

Step-by-step explanation:

$3(3a ^{2} - 2a) \\a(3a - 2)$

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Please help me answer this question. I will give 15 points.

hichkok12 [17]

Answer:

acute

Step-by-step explanation:

Evaluate the angle C = (11x + 85)/3 at x = 13:

C(13) = (143 + 85)/3, or 76 degrees. This is an acute angle (more than 0 and less than 90 degrees).

6 0

3 years ago

Which quadratic equation has roots - 2 and 1/5 :

Sladkaya [172]

Answer:

$5 {x}^{2} \: + \: 8x \: - 2 \: = \: 0$

Step-by-step explanation:

$sum \: of roots = - 2 + \frac{1}{5} = - \frac{8}{5} \\ product \: of \: roots = - 2 \times \frac{1}{5} = - \frac{2}{5} \\ from \: general \: equation \\ a {x}^{2} + bx + c = 0 \\ {x}^{2} + \frac{8}{5} x \: - \frac{2}{5} = 0 \\ 5 {x}^{2} \: + \: 8x \: - 2 \: = \: 0$