Question

Find the product of 42 X 38 using the identity.

Answer 1

ANSWER

• {40+(-2)}{40+2}
• 40^2+(2-2)x+(2*-2)
• 1600+(-4)
• 1600-4
• 1596

MORE IDENTITIES

• $( {x + y)}^{2} = {x}^{2} + 2xy + {y}^{2}$
• $( {x - y)}^{2} = {x}^{2} - 2xy + {y}^{2}$
• ${x}^{2} - {y}^{2} = (x + y)(x - y)$
• $(x + a)(x + b) = {x}^{2} + (a + b)x + ab$

HOPE HELPFUL THANK YOU

Answer 2

Refer to the attachment.... thanks