Question

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(x+4) (x-7)
Answer this very urgent
I will make you brainlieist​

Answer 1

Answer:

( x + 4 ) ( x + 7 )

[ ( x + a ) ( x + b ) = x2 + ( a + b ) x + ab ]

here x = x ,

a = 4

and b = 7 x2 + ( 4 + 7 ) x + 4x7 x + 11x +

Answer 2

Answer:

(x−5)(x−7)(x+6)(x+4)=504{(x−5)(x+4)}{(x−7)(x+6)}=504(x2−x−20)(x2−x−42)=504

Put x2−x=t

(t−20)(t−42)=504t2−62t+840=504t2−62t+336=0t2−6t−56t+336=0t(t−6)−56(t−6)=0(t−56)(t−6)=0t=56,6x2−x=t

For t=56

x2−x=56x2−x−56=0x2−8x+7x−56=0x(x−8)+7(x−8)=0(x+7)(x−8)=0