1.Wykonaj mnożenie:
a) (a+1)(a-1)=
b) (x-15)(x-1)=
c) (4+x)(x-8)=
d) (3a-2b)(a+b)=
e) 2(b-3c)(b+3c)=
f) (a kwadrat + b kwadrat)(a-b) razy 5)=
Zad.2
Wykonaj mnożenie:
a) ( pierwiastek z 5 - pierwiastek z 3)(pierwiastek z 5 + pierwiastek z 3)=
b) (pierwiastek z 7+4)(4+ pierwiastek z 7)=
c) ( pierwiastek z 11 + 2)(pierwiastek z 11 - 2)=
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wzory skroconego mnozenia uzywasz
a. a-1
b.x²-16x+15
c.x²-8x+4x-32=x²-4x+32
d.3a²-2ab+3ab-2b²=3a²+ab-2b²
e.2(b²-9c²)=2b²-18c²
f.5a³-5a²b+5ab²-5b³
2a.5-3=2
b.7+2*4*√7+16=23+8√7
c.11-4=7
1.
a) (a+1)(a-1)=a²-1
b) (x-15)(x-1)=x²-x-15x+15=x²-16x+15
c) (4+x)(x-8)=4x-32+x²-8x=x²-4x-32
d) (3a-2b)(a+b)=3a²+3ab-2ab-2b²=3a²-2b²+ab
e) 2(b-3c)(b+3c)=2(b²-9c²)=2b²-18c²
f) (a²+ b²)(a-b)*5=5(a³-a²b+ab²-b³)=5a³-5a²b+5ab²-5b³
2.
a)) (√5 -√3)(√ 5 +√3)=5-3=2
b) (√7+4)(4+ √7)=4√7+7+16+4√7=8√7+23
c) (√11 + 2)(√11 - 2)=11-4=7