Question

1.Wykonaj mnożenie i zredukuj wyrazy podobne.

a) (a - 4)(a=5)=

b) ( 7b + 3)(2-4b)=

c)(-3c +2d)(2c-6)=

d)(9s -2t)(7t-s)

e)(- 10m+ 3n)(5n-4)

f)(3kl + 8k)(4-2l)

g)( 4xy+ 3x)(2y+5xy)

h)(-2p2q- 3p)(5pq-3p2q2)=

Bardzo pilne na poniedziałek! Proszę o odpowiedź.

Answer 1

a) (a - 4)(a+5)=a²-4a+5a-20=a²+a-20

b) ( 7b + 3)(2-4b)=14b-28b²+6-12b=-28b²+2b+6

c)(-3c +2d)(2c-6)==-6c²+18c+4cd-12d

d)(9s -2t)(7t-s)=63st-9s²-14²t+2st=-9s²-14²t+65st

e)(- 10m+ 3n)(5n-4)=-50mn+40m+15n²-12n

f)(3kl + 8k)(4-2l)=12kl-6kl²+32k-16l

g)( 4xy+ 3x)(2y+5xy)=8xy²+20x²y²+6xy+15x²y

h)(-2p²q- 3p)(5pq-3p²q²)=-10p³q²+6p⁴q³-15p²q+9p³q²=-p³q²+6p⁴q³-15p²q

 

Answer 2

a)a^2-5a-4a+20=a^2-a+20

b)14b-28b^2+6-12b=2b-28b^2+6

c)-6c^2-18c+2cd-12d

d)63st-14t^2-9s^2+2st=65st-14t^2-9s^2

e)-50mn-40m+15n^2-12n

f)12kl-6kl^2+32k-16kl=-4kl-6kl^2+32k

g)4xy^2+20x^2*y^2+6xy+15x^2y

h)-20p^2q^2+48p^2q^2-3qp^2 +36qp^2=28p^2q^2+33qp^2