Question

am urgent nevoie de ajutor :'(
mai am 20 puncte...le ofer numai ca sa termin tema ca azi intru la 12 :'(
help mee!!! :(((
Descompuneti in factori,folosind formula a-b²= (a-b)(a+b) :
a) a² - 2;
b) 5 - b²;
c) 2x² - 3;
d) a² - 3b²;
e) 7x² - y²;
f) 2x² - 9y²;
ajutooor :'((

Answer 1

Te ajut la b ) , d ) si f ) !
b) $( \sqrt{5} )^{2} - b^{2} = ( \sqrt{5} - b )( \sqrt{5} + b ) ;$
d ) $a^{2} - ( \sqrt{3 } b)^{2} = ( a - \sqrt{3} b )( a + \sqrt{3} b ) ;$
f) ( $( \sqrt{2} x)^{2} - (3y)^{2} = ( \sqrt{2}x - 3y )( \sqrt{2}x + 3y ) ;$

Bafta !

Answer 2

a) a² -(√2)² = (a-√2)(a+√2)
b) (√5)² - b² = (√5 -b)(√5+b)
c) (√2x)² - (√3)² = (√2x-3)(√2x+3)
d) a² - (√3b)² = (a -√3b)(a+√3b)
e) (√7x)² - y² = (√7x -y)(√7x+ y)
f (√2x)² -9y² = (√2x-3y)(√2x + 3y)