Question

pls solve this pls I will mark you brainleist ​

Answer 1

18 :)

By using remainder theorem,

x = - 1

x³ + 2x² - 5ax - 7 = A

( - 1) ³ + 2 ( - 1 )² - 5 ( - 1 )a - 7 = A

- 1 + 2 - 7 + 5a = A

-6 + 5a = A

when x² + ax² - 12x + 6 is divided by x - 2

Then, by using remainder theorem,

x = 2

x³+ ax² - 12x + 6 = B

( 2 )³ + a ( 2 )² - 12 ( 2 ) + 6 =B

8 + 4a - 24 + 6 = B

4a - 10 = B

2A+B= 6

2 ( 5a - 6 ) + (4a - 10 ) = 6

10a - 12 + 4a - 10 = 6

14a - 22 = 6

14a = 28

a = 2 => Answer

19 :)

(-11)³ + (7)³+ (4)³

Let,

x = -11, y = 7 & z = 4

= x + y + z

= -11+ 7 + 4

= 0

Here, x + y + z = 0

We know that if x + y + z = 0, then x³ + y³ + z³ = 3xyz

Therefore, (-11)³ + (7)³ + (4)³ = 3(-11)(7)(4)

= -924 => Answer

20 :)

(i) Quadratic

(ii) Degree

(iii) sorry, but I don't know this answer.

(iv) Binomial

(v) One

(vi) Linear

(vii) Zero

(viii) sorry, but I don't know this answer.

(ix) Two

Hope it helps you ☺️,

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