Respuesta :
Answer:
X^2 + 70x + 12000
Step-by-step explanation:
Is that what you wanted? I got that by using the distributive method.
Answer:
Step-by-step explanation:
(x+30)(x+40)
X(x+40) +30(X+40)
X²+40x+30x+1200
X²+70x+1200
by applaying quadrtic fromula we get
a=1, b=70, c=1200
(-b ± √(b2 − 4ac))/(2a)
put the values
(-70±√(70)²-4(1)(1200)/2(1)
(-70±√4900-4800)/2
(-70±√100)/2
(-70±10)/2
either or
-70+10/2 -70-10/2
-60/2 -80/2
-30 -40
so x={-30,-40}
