Question

i)
Solve the following quadratic equation by factorisation:
4y2 - 11y =15​

Answer 1

Answer:

(y+1)(4y-15)

Step-by-step explanation:

4y2-11y-15=0

4y2+4y-15y-15=0

4y(y+1) -15(y+1)

(y+1) (4y-15)

Answer 2

The value of  quadratic equation by factorisation of$4y^{2} -11y-15=0$ is $(y-15)(y+1)=0$.

Step-by-step explanation:

The given quadratic equation:

$4y^{2} -11y-15=0$

⇒ $4y^{2} -15y+4y-15=0$

⇒ $y(y+1)-15(y+1)=0\\\\(y-15)(y+1)=0$

The value of  quadratic equation by factorisation of$4y^{2} -11y-15=0$ is $(y-15)(y+1)=0$.