Question

Q) If x = -1 then find the value of the following expression.
a) x² -2x+1

b) ( x-2)² + (x-1)²

c) x³ + 3x² - 4x + 1

d) 2(x-3) - 3(x-1)​

Answer 1

Answer:

(a)

= (-1)² - 2 × (-1) + 1

= 1+2+1

= 4

(b)

= [(-1)-(2)]² + [(-1)-(1)]²

= (-3)²+(-2)²

= 9+4

= 11

(c)

=(-1)³+3×(-1)²-4×(-1) +1

=(-1)+3+4+1

=7

(d)

=2[(-1)-3] - 3[(-1)-1]

=2×(-4) - 3×(-2)

=(-8)+(6)

=(-2)