Question

what is the answer for y^2-7y+ 10

Answer 1

Step-by-step explanation:

y^2-7y+10

=y^2-5y-2y+10

=y(y-5)-2(y-5)

=(y-5)(y-2)

Answer 2

y^2-7y=10

We move all terms to the left:

y^2-7y-(10)=0

a = 1; b = -7; c = -10;

Δ = b2-4ac

Δ = -72-4·1·(-10)

Δ = 89

The delta value is higher than zero, so the equation has two solutions

We use following formulas to calculate our solutions:

y1=−b−Δ√2ay2=−b+Δ√2a

y1=−b−Δ√2a=−(−7)−89√2∗1=7−89√2

y2=−b+Δ√2a=−(−7)+89√2∗1=7+89√2