MCQ
While factorising the algebraic expression $20 x^2+5 x y^2-25 x y z$, a student followed the steps given below:
In which step did he make his first mistake?
Step I: $5 \times 2 \times 2 \times x \times x+5 \times x \times y \times y-5 \times 5 \times x \times y \times z$
Step II: $5 \times x(2 \times 2+y \times y+5 \times y \times z)$
Step III: $5 x\left(4+y^2+5 y z\right)$
In which step did he make his first mistake?
Step I: $5 \times 2 \times 2 \times x \times x+5 \times x \times y \times y-5 \times 5 \times x \times y \times z$
Step II: $5 \times x(2 \times 2+y \times y+5 \times y \times z)$
Step III: $5 x\left(4+y^2+5 y z\right)$
- AStep I
- ✓Step II
- CStep III
- Dno mistake
