Question

descompusa in factori expresia x la a doua +7x+12 este egala cu :
a)(x+4)(x+3)
b)(x-4)(x-3)
c)(x-3) la a doua
d)(x+4) la a doua
va rog repede , dau coroana

Answer 1

x^2 +7x +12= x^2 +3x + 4x +12
=x(x+3) + 4(x+3)
=(x+3)(x+4)

l am descompus oe 7x in 4x+3x
raspuns a) (x+4)(x+3)

Answer 2

Răspuns

x²+7x+12=(x+4)(x+3) ; x²+4x+3x+12=x(x+4)+3(x+4)=(x+4)(x+3)

Explicație pas cu pas: