Question

answers. plz if anybody. knows
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Answer 1

Step-by-step explanation:

1) what must be added to get y³-y² -3y-2 to get y²- 5y +6

let the added no. is to be a

y³-y²-3y-2 + a = y² - 5y +6

a= y²- 5y+6 - y³-y² -3y -2

a. = y³ -2y -4

2) what must be added to get 7x³+8x²-11x+9 to get 6x³-9x²+15x-3

let the added no. is to be a

7x³+8x²-11x+9 + a = 6x³-9x²+15x-3

a= 6x³-9x²+15x-3 - 7x³+8x²-11x+9

a= -1x³ - 17x² + 26x -12

3) 2(x+3)+5(x-1)

2(3+3)+5(3-1)

2 (6) + 5 (2)

2×6 + 5×2

12 + 10

22

4). (2x-5)(x+3) = 2x² + x +a

we can multiply the integers which is inside brackets

2x² + 6x - 5x -15 = 2x² + x +a

2x² + 1x -15 = 2x² + x+ a

2x² - 2 x² + 1x -x -15 = a

we can cut t he same same integer

-15 = a

5) (x+3) (2x-1)

2x² -x + 6x -3

6) (x- y) (x² + xy + y²)

( 3-2) (3²+3×2+ 2²)

(1) (9 + 6 + 4)

(1) (19)

1×19

19

7). 30p² + 40 q² + 40 q ² - 12pq - 72pq -30q² - 15q²

now arrange the according to variable

30p² + 40 q² + 40 q ² - 12pq - -15p²-30q² + 72pq

30p² + 40 q² + 40 q ² - 12pq + 15p²-30q² + 72pq

+15p² + 10q²+40q² -60pq

Answer 2

Answer:

Step-by-step explanation:

1 .... -y^3 =2y^2 -2y =8

2......-x^3 -17 x^2 +26 x -12

3.....11

4.....a=-15

5....2x^2 + 5x -3

6.... 19