y=-1(x-16)(x+42)

Solution for y=-1(x-16)(x+42) equation:

Simplifying
y = -1(x + -16)(x + 42)

Reorder the terms:
y = -1(-16 + x)(x + 42)

Reorder the terms:
y = -1(-16 + x)(42 + x)

Multiply (-16 + x) * (42 + x)
y = -1(-16(42 + x) + x(42 + x))
y = -1((42 * -16 + x * -16) + x(42 + x))
y = -1((-672 + -16x) + x(42 + x))
y = -1(-672 + -16x + (42 * x + x * x))
y = -1(-672 + -16x + (42x + x2))

Combine like terms: -16x + 42x = 26x
y = -1(-672 + 26x + x2)
y = (-672 * -1 + 26x * -1 + x2 * -1)
y = (672 + -26x + -1x2)

Solving
y = 672 + -26x + -1x2

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Simplifying
y = 672 + -26x + -1x2