1. 15m²-34m -16

5m × 3m = 15m²

5m × (-8) = -40m

2 × 3m = 6m

2 × (-8) = -16

combine and simplify like terms:

15m² - 40m +6m - 16

Answer: 15m² - 34m - 16

2. 25x²+3y²-10y-4

5x × (-3y) = -15xy

5x × 5x = 25x²

5x × 2 = 10x

(-2) × (-3y) = 6y

(-2) × 5x = -10x

(-2) × 2 = -4

y × (-3y) = -3y²

y × (5x) = 5xy

y × 2 = 2y

combine and simplify like terms:

25x² -3y² -15xy +5xy -10x +10x +6y +2y - 4

Answer: 25x² -3y² -10xy +8y -4

3. pwede po paayos ng number 3? para masagutan ko po

4. -9x +10 or 9x -10

(-4x +7) -(5x-3) = in subtraction po, copy the first number (-4x+7) and distribute the negative sign to the second number(5x-3).

so magiging ⬇️

-4x + 7 -5x +3

combine and simplify like terms:

-4x +7 -5x +3

Answer: -9x +10 or 9x-10

(paano ko nakuha yung 9x-10? i multiply mo sila sa -1 since bawal ang negative sign sa una.)

5. 4x³ - x² - 2x

(6x³ -4x) - (2x³ + x² -2x)

in subtraction, copy the first number (6x³ - 4x) and distribute the negative sign sa second number (2x³ + x² - 2x)

so magiging ⬇️

6x³ -4x -2x³ -x² +2x

combine and simplify like terms:

6x³- 2x³ - x² -4x +2x

Answer: 4x³ -x² - 2x