Question

descompuneti in factori:
a)9x^2-4
b) 100a^2-64
c) x^2-4/9
d) x^2-4xy+4y^2
'' ^2 '' - inseamna ca este la puterea a2a :)

Answer 1

a) $9x^{2} -4=(3x-2)(3x+2)$
b) $100a^{2}-64=(10a-8)(10a+8)$
c) $x^{2} - \frac{4}{9} = (x- \frac{2}{3} )(x+ \frac{2}{3} )$
d) $x^{2} - 4xy+4y^{2} = (x-2y)^{2}$