2( x + y ) ^ ( 2) - 9( x + y ) - 5
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2(x+y)² - 9(x+y)-5
= 2(x+y)²-10(x+y)+1(x+y) - 5
= 2(x+y) [ (x+y)-5] + 1 [(x+y) -5]
= [2(x+y)+1] [x+y-5]
= [2x+2y+1][x+y-5]
= 2(x+y)²-10(x+y)+1(x+y) - 5
= 2(x+y) [ (x+y)-5] + 1 [(x+y) -5]
= [2(x+y)+1] [x+y-5]
= [2x+2y+1][x+y-5]
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>>. 2(X+y)^2-9(X+y)-5
>>. (2x+2y)^2-(9x+9y)^2-5
{using the identity (a+b)^2=a^2+b^2+2qb}
>>. {(2x^2 +2y^2+2(2x)(2y))}-{(9x^2+9y^2+2(9x)(9y))}
>>. 2x^2+2y^2+8xy-9x^2+9y^2+162xy
>>. 4x+4y+8xy-18x+18y+162xy
>>. -14x+22y+170xy
>>. -2(7x-11y-85xy)
>>. -2(7x-85xy-11y)
>>. -2(√7x+√-11)^2. 【ans】
HOPE THIS WILL HELP YA☺️
>>. (2x+2y)^2-(9x+9y)^2-5
{using the identity (a+b)^2=a^2+b^2+2qb}
>>. {(2x^2 +2y^2+2(2x)(2y))}-{(9x^2+9y^2+2(9x)(9y))}
>>. 2x^2+2y^2+8xy-9x^2+9y^2+162xy
>>. 4x+4y+8xy-18x+18y+162xy
>>. -14x+22y+170xy
>>. -2(7x-11y-85xy)
>>. -2(7x-85xy-11y)
>>. -2(√7x+√-11)^2. 【ans】
HOPE THIS WILL HELP YA☺️
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