1zadanie : (Wykonaj w sposób skrócony).
a) (-3c+7k)²=
b)(3a+5b)·(3a-5b)=
c) (-a+7v)·(a+7v)=
d) (-2t-8b)·(2t-8b)=
e) (-4s+5w)·(-4s-5w)=
2 zadanie.(Wykonaj działania)
a) (6x-5b)²=
b) (-2 i 2/7-2 1/8)·(2 2/7 -2 1/8 )=
3 zadanie : ( Uprość wyrażenia)
a) (3j+4k)²+(3t+6w)·(-6w+3t)=
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1za) 49k^2-42ck+9c^2
1zb) 9a^2-25b^2
1zc) 49v^2-a^2
z1d) -(2t+8b)(2t-8b)= -4t^2+32bt-64b^2
z1e) -(-4s+5w)(4s+5w)=-25w^2+40sw-16s^2
2za) 36x^2-60bx+25b^2
2zb) -(2 2/7+2 1/8)(2 2/7-2 1/8)=-(2 2/7)^2+(2 1/8)^2=-(16/7)^2+(17/8)^2=
-256/49+289/64=-16384/3136+14161/3136=-2223/3136
3za) 9j^2+24jk+16k^2+9t^2-36w^2
a) (-3c+7k)²= (7k - 3c)² = 49k² - 42kc + 9c²
b)(3a+5b)·(3a-5b)= 9a² - 25b²
c) (-a+7v)·(a+7v)= 49v² - a²
d) (-2t-8b)·(2t-8b)= -(2t + 8b)(2t - 8b) = - (4t² - 64b²) = -4t² + 64b²
e) (-4s+5w)·(-4s-5w)= -(4s + 5w)(5w - 4s) = -(25w² - 16s²) = -25w² + 16s²
a) (6x-5b)²= 36x² - 60xb + 25b²
b) (-2 i 2/7-2 1/8)·(2 2/7 -2 1/8 )= -(16/7 + 17/8)(16/7 - 17/8) = -(256/49 - 289/64) = -256/49 + 289/64
a) (3j+4k)²+(3t+6w)·(-6w+3t)= 9j² + 24jk + 16k² + 9t² - 36w²