(50+8) (50-10) solve using identities
@Parulekar :Good effort. Keep it up.
You made one small mistake. In 2nd line , b will be equal to -10 not 5.
Dear Student,
FORMULA- (x+a)(x+b)= x*x + (a+b)x +ab
x=50 a=8 b=(-10)
hence, (50+8)(50+(-10))= 50*50 + (8+(-10))50 + 8*(-10)
=2500+(8-10)50 - 80
=2500+(-2)50-80
=2500-100-80
=2400-80
=2320.
ANS= 2320.
Regards
You made one small mistake. In 2nd line , b will be equal to -10 not 5.
Dear Student,
FORMULA- (x+a)(x+b)= x*x + (a+b)x +ab
x=50 a=8 b=(-10)
hence, (50+8)(50+(-10))= 50*50 + (8+(-10))50 + 8*(-10)
=2500+(8-10)50 - 80
=2500+(-2)50-80
=2500-100-80
=2400-80
=2320.
ANS= 2320.
Regards