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Using suitable identities( 3 X + 5 )(3 X + 5) |
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Answer» (3x+5)(3x+5).It is in the form of (x+a)(x+b)=x²+(a+b)x+ab where x=3x, a=5 & b=5.(3x+5)(3x+5)=(3x)²+(5+5)(3x)+(5)(5). =9x²+10(3x)+25. =9x²+30x+25.(or).(3x+5)².It is in form of (a+b)²=a²+2ab+b² where a=x & b=5.(3x+5)²=(3x)²+2(3x)(5)+(5)². =9x²+30x+25.I think this is your answer. |
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