Question

y=(x+1)(x+3) solve using completing square method​

Answer 1

Answer :

• Identity used = (x + a)(x + b)= ${x}^{2}+ ( a + b)x + ab$

= y= (x+1)(x+3)

= y = ${x}^{2}+ ( 1 + 3)x + 1×3$

= y = ${x}^{2}+ 4x + 3$

The value of y is $\underline{{x}^{2}+ 4x + 3}$.

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