Question

Tolong jawabin dong no 1 dan 2

Answer 1

1. a. x
b. 4
c. 4,6,5,9
d. 9

2. a. 4p+6q-7p-5q = 4p-7p+6q-5q
= -3p+q.
b. 5xy-7xy²+7yx-8xy² = 5xy+7xy-7xy²-8xy²
= 12xy-15xy².
c. 6p²-10p²q-8p²+p²q+2pq²
= 6p²-8p²-10p²q+p²q+2pq²
= -2p²-9p²q+2pq²
= -p(2p+9pq-2q²)

3. a. (3x+1)(x²-3x+5) = 3x³-9x²+15x+x²-3x+5
= 3x³-9x²+x²+15x-3x+5
= 3x³-8x²+12x+5.
b. 2x-5/3 + x-7/4 = 4(2x-5)+3(x-7)/12
= 8x-20+3x-21/12
= 11x-41/12.
c. 4m+2/2mn - 5m-10/10n
= 2(2m+1)/2mn - 5(m-2)/10n
= 4m+2-m²+2m/2mn
= 6m+2-m²/2mn
= -m²+6m+2/2mn.
d. (2a/3+1/b²)² = (2ab²+3/3b²)²
= (2ab²+3²)²/9b kuadrat 4

= 4a²b kuadrat4 + 12ab2+9/9b kuadrat4.

4. (x²+7x+10) : (x+2) = x+5
(4x²+6x) : (2x) = 2x+3

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